Esteban
San Diego, Calif.
> 925 933 7304
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cheers!
cm
On Apr 4, 9:30 pm, Grant Petersen <gr...@rivbike.com> wrote:
Have you all considered running the 2tt from bottom of head tube to
top of seat tube?
This arrangement would give the best triangulation, and avoid putting
a bending stress on the middle of any tubes, where the stresses of
bending moments would be highest. I also think this would give a
better appearance (primarily because it would have the most
triangulated appearance - it's the most direct way to cut that front
diamond-shape in the frame into two triangles, and optimum engineering
solutions just have a way of looking right).
James Black
Los Angeles, CA
Yes, yes, am complaining and whining about this way too much.
But now, a 29er mixte. That would be cool. And something I'd ride.
A lot.
Eric Platt
St. Pau, MN
Marty
Marty
On Apr 5, 8:29 am, Bruce <fullylug...@yahoo.com> wrote:
> Good effort. Now, how would it look with the mixte stays added in as well? Pretty good I think and a better support for the seat tube when going trail bombing under big loads
>
> ________________________________
> From: Marty <mgie...@mac.com>
http://oldbike.wordpress.com/1931-raleigh-cross-frame-gents/
I do like Marty's version, maybe a add water bottle bridge on the
extra stays.
But, if Rivendell does change the design, maybe they should contact
the folks who have plunked down their money, and talk to them about it
a bit. I think most folks would probably be enthusiastic about the
change, but some folks might not be.
Matt
Here's a picture of a Alex Singer camping bike from VBQ:
http://www.vintagebicyclepress.com/images/CascadeBlewett.jpg
--mike
Adding the down and top tubes back to that imaginary frame would keep
the seat and head tubes from flexing fore-and-aft, and keep the BB
stable under pedaling loads.
Most modern tandems followed Santana's lead and went away from using
the marathon tube. They use a 'direct lateral' tube from the head
tube to the stoker's bottom bracket instead. That arrangement is
better at keeping the captain's bottom bracket from swaying, and
allowed more convenient bottle placement (no telling which factor was
more important). An oversized top tube is used to resist the twisting
forces. That arrangement has no place in a single IMO, as BB
stiffness is not a real issue. Calfee's CF tandems have no middle
tubes at all, they use huge top and boom tubes to keep everything
stiff enough.
The question to me is, how big does a rider or a touring load need to
be to need the extra stiffness of the diagonal tube? At what point
does the weight of the diagonal tube become less than the extra
thickness / diameter of the top and down tubes needed to achieve
comparable stiffness in a plain diamond frame?
Moot point for me, I'd fit a 54 Hunka so no diagonal tube for me.
Bill
On Apr 4, 10:03 pm, andrew hill <neurod...@gmail.com> wrote:
> parallel with the down tube might look pretty snazzy.
>
> best,
> andrew
>
> On Apr 4, 2010, at 9:52 PM, cyclotourist wrote:
>
>
>
> > No Kevin, don't do it.....
>
> > On Sun, Apr 4, 2010 at 9:45 PM, Esteban <proto...@gmail.com> wrote:
> > Fits the bike. Truly unique.
>
> > Esteban
> > San Diego, Calif.
>
> > On Apr 4, 9:30 pm, Grant Petersen <gr...@rivbike.com> wrote:
> > > Midpoint of headtube to midpoint of seat tube. Sorta mixte-like. (Jim
> > > Thrill/Hiawatha said...)
>
> > > Keven loves the 62 Betty/Yves, and rides it a lot, and rode it with weight,
> > > and remarked how well it carried it, not what you'd expect from a mixte. But
> > > the design like that works, and that lead to the diagonalization of the 2tt
> > > (second top tube, I'm tired of typing it all out), and some friendly turmoil
> > > here. It's Keven's call, which way it goes, but I think it's looking
> > > diagonal. That's where I'd put my puka-shells.
>
> > > G
>
> > > --
> > > Grant
> > > Rivendell Bicycle Workswww.rivbike.com
> > > 925 933 7304
>
> > --
> > You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group.
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Two other observations in this discussion though:
This is the second Riv frame that seems to be getting significant
input from someone other than Grant (Rodeo designed by Mark, Keven at
least some decisions on this one). Maybe this has happened before with
less discussion, but it's interesting that it's part of the
conversation with these frames.
Also, if the 2nd top tube angle changes, will the decal have to change
so the 2nd line in the Hunq's H matches it? (in the 2tt world, i like
that this logo mirrors the frame)
--
Bill Connell
St. Paul, MN
With full-length twin laterals, ala the Singer camping, or the
original Breezer, that might work. That's a copy of the Schwinn
Excelsior frame.
Also, on a slightly different note. With the center tube, would make
it difficult to sqeeze both a larger bottle and frame pump in without
interference. At least on a 58. And forget using a pump with a mount
like the Topeak Morph series.
Finally, it looks like a half hearted attempt to copy a Salsa Fargo.
Without the extra standover.
Yes, I'm upset about this. Will probably end up losing a lot of money
selling off my frame without building it up. Not something I can live
happily with.
Sigh.
Eric Platt
St. Paul, MN
> > For more options, visit this group athttp://groups.google.com/group/rbw-owners-bunch?hl=en.- Hide quoted text -
>
> - Show quoted text -
Having looked at the first mockup, I'm not convinced. Jars my view
too much. Also makes it look like it's a "fatty" bike. Fine. I'm
fat. That's been established. Don't like the idea that I'm stuck
riding a "special" bike.
With full-length twin laterals, ala the Singer camping, or the
original Breezer, that might work. That's a copy of the Schwinn
Excelsior frame.
Also, on a slightly different note. With the center tube, would make
it difficult to sqeeze both a larger bottle and frame pump in without
interference. At least on a 58. And forget using a pump with a mount
like the Topeak Morph series.
Finally, it looks like a half hearted attempt to copy a Salsa Fargo.
Without the extra standover.
Yes, I'm upset about this. Will probably end up losing a lot of money
selling off my frame without building it up. Not something I can live
happily with.
Sigh.
Eric Platt
St. Paul, MN
On Apr 5, 8:27 am, Dan Abelson <d...@abelsons.net> wrote:
Shaun Meehan
-----Original Message-----
From: rbw-owne...@googlegroups.com [mailto:rbw-owne...@googlegroups.com] On Behalf Of happyriding
Sent: Monday, April 05, 2010 12:04 PM
To: RBW Owners Bunch
Subject: [RBW] Re: Diagonapillar
Just an opinion, and not meant to insult anyone...but that is the
ugliest bike I've ever seen. Sorry. Just one opinion.
I suspect one reason Rivendell might like to do the diagonal 2tt is
marketing: it helps differentiate the Hunaqpillar from the Bombadil--
even if it doesn't improve on it. But if Rivendell's goal is to
actually sell some frames, then I think a diagonal 2tt will be a tough sell. But then I thought the Bomadil would be a tough sell, too.
Also, unless Rivendell does some testing on the strength differences (do they even have the capability?), I think that using a diagonal 2tt would be a rash decision.
As for people like EricP, this new diagonal 2tt idea seems contrary to everything Rivendell said during the pre-order period:
1) Trust us
2) July delivery a good possibility
3) Only minor tweaks
I imagine Rivendell would be willing to return deposits--but that won't cure the disappointment.
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| I may have missed this earlier in the discusion, but I assume that the 54 would still have only one top tube. Is that the current understanding as far as we know? |
|
|
|
On Apr 5, 9:12 am, "Allingham II, Thomas J"
<Thomas.Alling...@skadden.com> wrote:
> I don't post very often (Jim pointed out there's an endless footer attached to my messages when I do!), but let me offer the opinion of an Atlantis and Bombadil owner (which means that I ain't buying one no matter what the decision is): I think the diagonal 2tt (the Campeur approach) is extremely attractive, AND cool, AND very likely highly, highly functional. For those who agree with the first two judgments (and there will obviously be disagreements), it is a grand slam home run.
>
> -----Original Message-----
> From: rbw-owne...@googlegroups.com [mailto:rbw-owne...@googlegroups.com] On Behalf Of happyriding
> Sent: Monday, April 05, 2010 12:04 PM
> To: RBW Owners Bunch
> Subject: [RBW] Re: Diagonapillar
>
> Just an opinion, and not meant to insult anyone...but that is the
> ugliest bike I've ever seen. Sorry. Just one opinion.
>
> I suspect one reason Rivendell might like to do the diagonal 2tt is
> marketing: it helps differentiate the Hunaqpillar from the Bombadil--
> even if it doesn't improve on it. But if Rivendell's goal is to
> actually sell some frames, then I think a diagonal 2tt will be a tough sell. But then I thought the Bomadil would be a tough sell, too.
>
> Also, unless Rivendell does some testing on the strength differences (do they even have the capability?), I think that using a diagonal 2tt would be a rash decision.
>
> As for people like EricP, this new diagonal 2tt idea seems contrary to everything Rivendell said during the pre-order period:
>
> 1) Trust us
> 2) July delivery a good possibility
> 3) Only minor tweaks
>
> I imagine Rivendell would be willing to return deposits--but that won't cure the disappointment.
>
> --
> You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group.
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I'm also with Matt on this for those who pre-ordered, and I'm one of
them. It would be a substantial change to the design that was
presented to early adopters and therefore if they're going to go
through with this they need to contact each of those people. It sounds
like an interesting design change, possibly for the better(looking and
functioning) but it's a much bigger change than adding lining to
lugs.. I'm sure they'll do the right thing though.
Now back to speculation!!
On Apr 5, 6:17 am, newenglandbike <matthiasbe...@gmail.com> wrote:
~Mike~
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> > This email (and any attachments thereto) is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this email, you are hereby notified that any dissemination, distribution or copying of this email (and any attachments thereto) is strictly prohibited. If you receive this email in error please immediately notify me at (212) 735-3000 and permanently delete the original email (and any copy of any email) and any printout thereof.
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Cheers!
cm
Portaging a bike is a main thing that gives me pause with the 2tt
designs. I may be wrong, but from your description, it sounds like
you're carrying the bike like a large piece of luggage, which might be
a lot simpler in a train station setting. In my case, there are at
least a couple of places around town where trail access involves a
long staircase or (on one offroad trail) a long log crossing, so i
shoulder the bike, cyclocross-style. I don't use a tt-mounted pump on
most bikes for this reason, and the smaller triangle of a 2tt would
make it more difficult. Of course, i recognize most people probably
don't generally have reason carry their bikes like this.
Yeah, luggage style. My BART bike tends to be in the 45-50lb range
loaded with all my work related stuff. My shoulder couldn't take
that.
other Bill
On Apr 5, 10:14 am, Bill Connell <bconn...@gmail.com> wrote:
> --
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>
>
--
Riv isn't going to make any drastic changes to the Hunq, or else
they'd have to call it something else.
What you see here is pure fantasy. One thought about TT's not being
parallel and all of the sudden we have a whole new frame?
Nah.
Steve
-----Original Message-----
From: rbw-owne...@googlegroups.com
[mailto:rbw-owne...@googlegroups.com]On Behalf Of happyriding
Sent: Monday, April 05, 2010 1:49 PM
To: RBW Owners Bunch
Subject: [RBW] Re: Diagonapillar
Did you see the name of the op? It's not April 1 anymore, either.
Oh, yeah. Here is james black's suggested tube orientation--the two
triangles are better than one geometry:
http://www.flickr.com/photos/49416858@N00/4494282750/
Thanks for mocking that up! It doesn't look as good as I had imagined
when I described it - with a longer headtube, it would only improve.
But I still think it looks better, more sensible and organic in a way,
than any of the other schemes - except for the the campeur-style with
the added stays, which I think would be a brilliant choice!
James Black
Los Angeles, CA
FWIW, I saw a campeur in a (cool) shop in Paris last year - Rando Cycles
http://www.flickr.com/photos/66275745@N00/4494454218/
... I think it was the owner's bike. Big/tall dude... big/tall bike
(and, all Campy Euclid iirc)!
James: your triangulation suggestion reminded me of old
Koski/Trailmaster stuff... (Kinda hard to) see:
http://mombat.org/80Koski5.jpg
http://mombat.org/80Koski8.jpg
http://mombat.org/Koski.htm
=- Joe Bunik
Walnut Creek, CA
On Apr 5, 11:08 am, james black <chocot...@gmail.com> wrote:
http://www.flickr.com/photos/45758191@N04/4494550338/
On Apr 5, 8:27 am, Dan Abelson <d...@abelsons.net> wrote:
the new design is just that, a new design. it's different than what
was initially shown during the presale and all the here's da hunka
stuff. If someone doesn't like the changes ( i haven't made up my mind
yet ), I don't see anything wrong with them asking for a refund as it
is a different bike.
Losing a customer with a change like this is a possibility sure, but I
hope they're not losing "friends or fans" over this!
Matt
On Apr 5, 2:50 pm, happyriding <happyrid...@yahoo.com> wrote:
> Just read that myself. It seems like some hard feelings are being
> formed.
On Apr 5, 1:50 pm, happyriding <happyrid...@yahoo.com> wrote:
> Just read that myself. It seems like some hard feelings are being
> formed.
>
> On Apr 5, 3:28 pm, William <tapebu...@gmail.com> wrote:
>
Meanwhile, on back on the little ol' Betty (which....funny isn't
it..the Hunq is beginning to ever-so-slightly
resemble...muhuhuwahahaha.....)
On Apr 5, 9:01 am, William <tapebu...@gmail.com> wrote:
> No choice Grant and Keven make is going to make everybody happy.
> > St. Paul, MN- Hide quoted text -
And these were never svelte bikes. They are intended to be tanks,
plowers, mowers...anything that adds strength (and innovation to boot)
for this utility machine is welcomed... especially from Keven and
Grant who do a lot of tinkering and riding and experimenting.
Patience is a virtue. I'm liking this bike more and more.
Esteban
San Diego, Calif.
Sorry to the list if I've made too much and lead to discord. Not my
wish. Do not want to alienate others because of my own stupid ideas.
Am not mad at Rivendell at all. The blame (if there is any) lies
squarely with me in this case.
Eric Platt
St. Paul, MN
> > > - Show quoted text -- Hide quoted text -
I don't think anyone should or would fault you for not wanting to
follow through on buying a bike that changed into something you don't
like.
Personally, the only thing you said that I thought was a bit unfair
was the statement that the bike seemed like a 'half-hearted copy' of
another bike. I don't know Grant or Keven well enough to really know
how they might feel about reading that, but I can't imagine it being
pleasant. I don't think Grant or Keven is a copycat, and I don't
think they approach bike design half-heartedly, and I bet you don't
either. It's fine being honest about subjective things like the
design is 'jarring' or even ugly if that's the way you feel.
I like the diagon-apillar 58% as much as the regul-apillar.And I dont
get it. And it doesnt seem necessary. And I am not sorry.
Cheers!
cm
And for those of you who don't like to click links, you will find the
details below:
OK, this is it folks, the rough riders ride to equal if not beat the best of
the best. You will not be sorry, unless you don't come.
We're going to do a version of the Boulder Creek Loop that the Rough Riders
did last July:
http://www.xo-1.org/2009_07_01_archive.html
This version will be shorter than the original RR version at "only" 40+
miles and 5000 feet of climbing, but will involve more dirt. About 80-85%
dirt.
We'll start in the hamlet of Descanso and head north up Boulder Creek Road,
as you can see on the map below. However, when we get to Lake Cuyamaca, we
we will head south using fire roads rather than the pavement on route 79.
(Those with skinnier tires or who are feeling tired can still opt for the
pavement of route 79 and end up in the same place).
http://ridewithgps.com/routes/51619
Basically, you get about half the ride on super smooth dirt road and the
second half on fire road with almost no traffic at all. It's about as good
as it gets. The ride itself takes about 5.5hrs+. You will not wish for more.
There is one stop for water and food refueling at the half way point.
Camelback or 3 bottles recommended.
You will climb.
If you want to take the fire roads in the second half of the ride, something
fatter than 35s is recommended. Otherwise, the pavement may be the better
option.
Yes, yes, Descanso is far from LA. But just pretend you are a hardened
mountain biker. We routinely drive 2.5 hrs up to do the Palm Canyon Epic or
SART. It's worth driving for an epic ride! Don't wuss out and make mountain
bikers laugh at you because you are afraid to drive or commit a whole day
for some nice dirt.
We may look into getting a University of San Diego apt/crash pad if folks
want to drive up the night before. This depends on folks committing to the
ride and expressing an interest in it. If you come the night before, dinner
and beer will be scheduled.
Finally, please let us know if it would make a difference if we do it on May
1 or 2. Thanks!
While I agree with GP that triangles look better, and bicycles are all
about triangles ...... more of them doesn't necessarily mean better.
Double top tubes parallel
looks masculine...... works great for carrying and stand
mounting....... a diagonal or mixte tube doesn't.
I'm wondering out loud ... if extra diagonal type tubed frames were so
popular ..... why are they not sold in mass?
I see a warmish response here in this forum .... but you know how some
things go ..... people say they love the design ..... but when it
comes time to actually
buy and own one ..... "personal reality" checks in. . . . and they
may not want it. It's like seeing a fancy prototype at the bike
show .... it looks great .... you drool over it ...
but you just don't get one ..... for whatever reason..... usually it's
too far "out of the norm". What would so and so think? ... etc.
The mind is an never ending ride to nowhere.
As a Bombadil owner I didn't see the point of "copying" the design and
making it $500 cheaper in Taiwan, even though I wish the Bombadil
sizes were adjusted to match the new proposed Hunqa sizes.
The diagonal second tube ala "mixte" I find very charming and visually
appealing, as well as differentiating it from the Bombadil. Assuming
equal functionality, one can now choose the design they like best and
the price difference as well as origin of the frame can become
secondary.
That being said, I have no idea on the implications of these design
variations on the quality of the ride. I do love riding my Bombadil;
it's taught me to ride slow and enjoy the ride more. Before, it was
always a frustrating experience of trying to ride hard to lower my
average speed...
I'm very curious to see where the Hunqa takes us...
René
On 4/6/10, happyriding <happy...@yahoo.com> wrote:
> On Apr 5, 6:16 pm, William <tapebu...@gmail.com> wrote:
>> Eric
>>
>> I don't think anyone should or would fault you for not wanting to
>> follow through on buying a bike that changed into something you don't
>> like.
>>
>> Personally, the only thing you said that I thought was a bit unfair
>> was the statement that the bike seemed like a 'half-hearted copy' of
>> another bike. I don't know Grant or Keven well enough to really know
>> how they might feel about reading that, but I can't imagine it being
>> pleasant. I don't think Grant or Keven is a copycat,
>>
>
> As far as I can tell, there is nothing about the shape of Rivendell's
> bicycles that hasn't been done before. There are very few creative
> new bike designs. But, I think I have discovered one. I call it the
> Trianga-pillar:
>
> http://www.flickr.com/photos/49416858@N00/4495790421/
>
> Patent pending.
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> "RBW Owners Bunch" group.
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>
>
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Sent from my mobile device
With you on that. The Hilborne does Hilsen things but its design is
notably different. I had trouble getting the reason for the Hunqa
before the design change.
> The diagonal second tube ala "mixte" I find very charming and visually
> appealing, as well as differentiating it from the Bombadil. Assuming
> equal functionality, one can now choose the design they like best and
> the price difference as well as origin of the frame can become
> secondary.
Agree again. A proud and happy owner of a Bruce Gordon Rock n' Road,
I need one of these bikes as much as I need a new hole in my head.
Bringing back the diagonal second tube caught my attention. A lot of
great old builders used the concept to good effect in days gone by.
It would be fun to have a modern variation.
On Apr 6, 3:34 pm, Rene Sterental <orthie...@gmail.com> wrote:
> I will apologize first, but do think this "triangapillar" is just
> taking the discussion to a silly level.
>
> As a Bombadil owner I didn't see the point of "copying" the design and
> making it $500 cheaper in Taiwan, even though I wish the Bombadil
> sizes were adjusted to match the new proposed Hunqa sizes.
>
> The diagonal second tube ala "mixte" I find very charming and visually
> appealing, as well as differentiating it from the Bombadil. Assuming
> equal functionality, one can now choose the design they like best and
> the price difference as well as origin of the frame can become
> secondary.
>
> That being said, I have no idea on the implications of these design
> variations on the quality of the ride. I do love riding my Bombadil;
> it's taught me to ride slow and enjoy the ride more. Before, it was
> always a frustrating experience of trying to ride hard to lower my
> average speed...
>
> I'm very curious to see where the Hunqa takes us...
>
> René
>
> Sent from my mobile device- Hide quoted text -
Yes, we all know that Grant is a real slouch when it comes to
designing bikes that handle well.
On Apr 6, 4:22 pm, happyriding <happyrid...@yahoo.com> wrote:
> On Apr 6, 2:34 pm, Rene Sterental <orthie...@gmail.com> wrote:
>
> > I will apologize first, but do think this "triangapillar" is just
> > taking the discussion to a silly level.
>
> Somewhat. But from an engineering standpoint, three triangles are
> stronger than two. So technically, it is a stronger design than the
> diaga-piller. Also, I question whether the diaga-piller, which I
> hereby dub the dragon-pillar because it rolls off the tongue easier,
> is actually stronger. It creates two flattish somewhat triangular
> shapes. The flatness is the problem, I think. Not much strength in
> that. And really, they aren't even triangles to begin with. I would
> like to see some test results.
>
> I also wonder if someone can speak to the concept of using short stems
> on big frames to get the reach right. The Bombadil has a longish top
> tube for me. With drop bars, if I want to sit more upright than on a
> road bike, for example when touring, I would have to use a very short
> stem. From what I've read that affects the handling--negatively. A
> large frame should have a 12, 13, or 14 cm stem so that one's weight
> is distributed properly between the front and rear. It seems like the
> Bombadil was designed for mustache bars that extend backwards, but how
> does that affect the handling?
My Bombadil has an 8cm dirt drop stem and I've used it fully loaded
for long distance touring. With 48cm drop bars and front panniers, the
bike handled predictably and easily. I was amazed at the low speed
handling *and* stability on fast descents. I have noticed that
unloaded as an MTB, using relatively narrow flat bars (48cm flat end
to end), I'm not very comfortable with technical, off road trails. All
of these trails are ones that I can manage easily on other bikes. The
steering feels too responsive and I get a little sketched out. I'll be
putting wider bars on soon - extra bar width should compensate by
slowing down the steering response a bit.
Dave
On Apr 6, 2:22 pm, happyriding <happyrid...@yahoo.com> wrote:
> On Apr 6, 2:34 pm, Rene Sterental <orthie...@gmail.com> wrote:
>
> > I will apologize first, but do think this "triangapillar" is just
> > taking the discussion to a silly level.
>
jim m
wc ca
Dave did not say the Bomba does not handle as well off road. Dave
said as he had it set up, the Bomba was too skittish for technical off
road riding. Dave will address that with proper handle bars. Dave
expects the Bomba to perform well once he does.
On Apr 6, 5:44 pm, happyriding <happyrid...@yahoo.com> wrote:
> Hi,
>
> On Apr 6, 3:56 pm, Dave Craig <dcr...@prescott.edu> wrote:
>
> > I have a 60cm Bombadil and it does indeed have a long top tube for me.
>
> Thanks for posting. That is the size I would slot into.
>
> > I seem to recall from the beginning that Grant designed the Bombadil
> > with the dirt drop stem in mind. There are few stems shorter than the
> > 8cm dirt drop.
>
> > My Bombadil has an 8cm dirt drop stem and I've used it fully loaded
> > for long distance touring. With 48cm drop bars and front panniers, the
> > bike handled predictably and easily. I was amazed at the low speed
> > handling *and* stability on fast descents. I have noticed that
> > unloaded as an MTB, using relatively narrow flat bars (48cm flat end
> > to end), I'm not very comfortable with technical, off road trails. All
> > of these trails are ones that I can manage easily on other bikes. The
> > steering feels too responsive and I get a little sketched out. I'll be
> > putting wider bars on soon - extra bar width should compensate by
> > slowing down the steering response a bit.
>
> Of course, a longer stem would also slow the steering down. It's
> interesting that the Bombadil doesn't handle as well when used off-
> road--when it is marketed as a mountain bike.
> On Apr 6, 2:34 pm, Rene Sterental <orthie...@gmail.com> wrote:
>> I will apologize first, but do think this "triangapillar" is just
>> taking the discussion to a silly level.
>>
>
> Somewhat. But from an engineering standpoint, three triangles are
> stronger than two. So technically, it is a stronger design than the
> diaga-piller.
If you are talking about the photoshopped image with a triangle in the
middle of the mainframe, and claiming greater strength for a working bicycle
design, it's fun to look at, but I'd have to disagree.
That structure may bear more vertical weight, _if_ the tubes were uniform
wall thickness, but in terms of stresses which a bicycle encounters, it has
some drawbacks.
The "inner" triangle is attached where the wall thickness is thinnest. You
are adding a structure which focuses stress at the thinnest part of the
tube. Stress risers x 3.
The reason that we can use butted and double-butted tubing for bicycle
fabrication is that the center of the tube doesn't receive as much stress.
The main stresses operating on a frame are the torque from applying power to
the pedals and the impacts from uneven terrain directed into the headtube.
A second top tube, or an angled "second tube" (mixte-like, or something like
the early Breezers, modern tandems) creates two trusses in the area of the
front main triangle of the frame. What was a large open structure is now
segmented. This helps it to resist the torquing involved when a rider
stomps on the left pedal and pulls hard on the right handlebar.
Additionally, it will distribute frame shock down three vectors rather than
two.
- Jim
--
Jim Edgar
Cyclo...@earthlink.net
Cyclofiend Bicycle Photo Galleries - http://www.cyclofiend.com
Current Classics - Cross Bikes
Singlespeed - Working Bikes
| Good point about the water bottles. In particular, a touring bike should have multiple, easily available water bottles. Jim D. Massachusetts --- On Tue, 4/6/10, Garth <gart...@gmail.com> wrote: |
|
|
Unfortunately there is no way I can afford a Hunqapillar unless I sell
my Atlantis... :-/ Anybody in the market for a 66CM Atlantis?
Ethan
On Apr 5, 12:12 pm, "Allingham II, Thomas J"
<Thomas.Alling...@skadden.com> wrote:
> I don't post very often (Jim pointed out there's an endless footer attached to my messages when I do!), but let me offer the opinion of an Atlantis and Bombadil owner (which means that I ain't buying one no matter what the decision is): I think the diagonal 2tt (the Campeur approach) is extremely attractive, AND cool, AND very likely highly, highly functional. For those who agree with the first two judgments (and there will obviously be disagreements), it is a grand slam home run.
>
> -----Original Message-----
> From: rbw-owne...@googlegroups.com [mailto:rbw-owne...@googlegroups.com] On Behalf Of happyriding
> Sent: Monday, April 05, 2010 12:04 PM
> To: RBW Owners Bunch
> Subject: [RBW] Re: Diagonapillar
>
> Just an opinion, and not meant to insult anyone...but that is the
> ugliest bike I've ever seen. Sorry. Just one opinion.
>
> I suspect one reason Rivendell might like to do the diagonal 2tt is
> marketing: it helps differentiate the Hunaqpillar from the Bombadil--
> even if it doesn't improve on it. But if Rivendell's goal is to
> actually sell some frames, then I think a diagonal 2tt will be a tough sell. But then I thought the Bomadil would be a tough sell, too.
>
> Also, unless Rivendell does some testing on the strength differences (do they even have the capability?), I think that using a diagonal 2tt would be a rash decision.
>
> As for people like EricP, this new diagonal 2tt idea seems contrary to everything Rivendell said during the pre-order period:
>
> 1) Trust us
> 2) July delivery a good possibility
> 3) Only minor tweaks
>
> I imagine Rivendell would be willing to return deposits--but that won't cure the disappointment.
>
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I missed this from Garth earlier. Couldn't one say the same about any
Riv design, or, for that matter, lugged steel bike? If lugged steel
bikes are sold in mass, I have yet to see them.
Bikes with extra tubes are more expensive to make, and thus buy. They
are also heavier than most bikes. Many people never ride with loads
and to places such a bike would be needed. For those few who do,
having some attractive priced options from Riv make sense.
On Apr 7, 6:40 pm, James Dinneen <jfxdinn...@yahoo.com> wrote:
> Good point about the water bottles. In particular, a touring bike should have multiple, easily available water bottles. Jim D. Massachusetts
>
> --- On Tue, 4/6/10, Garth <garth...@gmail.com> wrote:
> To unsubscribe from this group, send email to rbw-owners-bun...@googlegroups.com.
Does Monster Cross refer to a cross county race in real rugged
conditions? Or does it mean real long self-supported tours?
I see the Hunq as possibly a very good candidate for the latter. I
think racers would be concerned about the weight - aren't racers
always obsessing about weight - of the Hunq.
As for water bottle placement - the old French diagonal campers found
room for multiple bottle cages. Not sure why a Hunq with a diagnoal
tube would not.
> Why does everybody try to categorize everything?
I read somewhere (maybe the NYTimes?) that most humans will
comfortably follow three sub-plots in a novel or movie. Any more,
they lose place and ultimately interest. Probably the need to plug
things into pigeon holes helps people keep to three sub-plots in life.
> > > For more options, visit this group athttp://groups.google.com/group/rbw-owners-bunch?hl=en.- Hide quoted text -
700C wheels
No suspension
Drop or drop inspired handlebars
>45c tires
Clearly the Hunqapillar could easily have all the above, so I guess it
could be a monstercross. Put racks and smooth fatties on it, then
it's your new category, the monster tour. I guess there are Adventure
Touring and Expedition categories, though. Seth was right, there
really is nothing new.
> > > > For more options, visit this group athttp://groups.google.com/group/rbw-owners-bunch?hl=en.-Hide quoted text -
> > > > > For more options, visit this group athttp://groups.google.com/group/rbw-owners-bunch?hl=en.-Hidequoted text -
Can say that again:
> > > > > For more options, visit this group athttp://groups.google.com/group/rbw-owners-bunch?hl=en.-Hidequoted text -
Surprised to read Chester is one of the progenitors. The few things I
have read by him come across almost Zen like. Never would have
thought he was given to hyperbole.
> > > > > > For more options, visit this group athttp://groups.google.com/group/rbw-owners-bunch?hl=en.-Hidequotedtext -
I wonder if there is a drawing, mock up, or other bike out there with
this config? It sounds kinda weird to me, but seeing it might change
everything.
cheers!
cm
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-----Original Message-----
From: P Merryman
Sent: May 8, 2010 6:57 PM
To: rbw-owne...@googlegroups.com
Subject: Re: [RBW] Re: Diagonapillar
Sorry I'm a month late posting, I'm "catching up" on a few months of non-lurking. Anyway, wanted to point out that, if I'm reading this right, Riv has done it before. From the web-archive.org of the Riv site:
-Pete
On Sun, Apr 4, 2010 at 10:22 PM, cm <chrisp...@hotmail.com> wrote:
I wonder if there is a drawing, mock up, or other bike out there with
this config? It sounds kinda weird to me, but seeing it might change
everything.
cheers!
cm
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