650b Atlantis?

[Leslie]

I'm pondering all sorts of things this afternoon...


As anyone ever done a 650b conversion on an Atlantis? 

Either, a 56 (26"-wheeled), or a 58 (700c-wheeled)?

[Peter Morgano]

Its been done, search the list archive, but I think it only worked from 26" to 650b, 700c to 650b didnt have enough down slot on the brakes.

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[C.J. Filip]

List member TomNez did a great job on his 56cm.

http://www.flickr.com/photos/75638054@N03/6943764941/in/faves-69091655@N08/

[Allingham II, Thomas J]

Here's a beautiful example from this year's Riv Rally East. http://www.flickr.com/photos/37542512@N04/7107683779/in/set-72157629518934850  It belongs to Tom Nezovich, from somewhere in Ohio (I think). From the comment on the photo, it sounds like there are others out there.  Tom's pretty tall; I'd be surprised if this was a 26 inch Atlantis, but I could be wrong.

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From: rbw-owne...@googlegroups.com [mailto:rbw-owne...@googlegroups.com] On Behalf Of Peter Morgano
Sent: Monday, July 09, 2012 3:04 PM
To: rbw-owne...@googlegroups.com
Subject: Re: [RBW] 650b Atlantis?

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[Allingham II, Thomas J]

Whoops, it was 559 -- here's a pic from before Tom did the conversion.  http://www.flickr.com/photos/75638054@N03/6796737106/in/photostream/

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From: rbw-owne...@googlegroups.com [mailto:rbw-owne...@googlegroups.com] On Behalf Of Allingham II, Thomas J
Sent: Monday, July 09, 2012 3:20 PM
To: 'rbw-owne...@googlegroups.com'
Subject: RE: [RBW] 650b Atlantis?

[Brevivelo]

It looks like a 58cm.... but I could be wrong too, but if it were a 700c I'd have concerns with BB height I would think. That looks plenty high leading me to think the frame could well be a 26" 56cm set up. Also the rear tire at least is filling the frame nicely.

 

I have 700c atlantis running v brakes and a 650b wheelset, will throw on the rims in the next couple of days and report. Current 650b tires are schwalbe marathons

On Tuesday, July 10, 2012 5:19:55 AM UTC+10, Pudge wrote:

Here's a beautiful example from this year's Riv Rally East. http://www.flickr.com/photos/37542512@N04/7107683779/in/set-72157629518934850  It belongs to Tom Nezovich, from somewhere in Ohio (I think). From the comment on the photo, it sounds like there are others out there.  Tom's pretty tall; I'd be surprised if this was a 26 inch Atlantis, but I could be wrong.

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From: rbw-owners-bunch@googlegroups.com [mailto:rbw-owners-bunch@googlegroups.com] On Behalf Of Peter Morgano

Sent: Monday, July 09, 2012 3:04 PM

To: rbw-owners-bunch@googlegroups.com

Subject: Re: [RBW] 650b Atlantis?

Its been done, search the list archive, but I think it only worked from 26" to 650b, 700c to 650b didnt have enough down slot on the brakes.

On Mon, Jul 9, 2012 at 3:01 PM, Leslie <leslie...@gmail.com> wrote:

I'm pondering all sorts of things this afternoon...


As anyone ever done a 650b conversion on an Atlantis? 

Either, a 56 (26"-wheeled), or a 58 (700c-wheeled)?

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[Brevivelo]

Sorry about double post ...but there is something going on with the brakes there too, Pauls?

[Leslie]

Yup, those are Paul's on it; I wonder if Paul's adjustability would help make a 700c-to-650b possible.... Hmmm....

[Michael_S]

kinda curious about how it will ride with the taller BB height?  The Hetres are  great tires and on a 56 frame they look really good.  

I've seen the LHT's with a similar wheel switch and they work well too.  I'm thinking about this change on my '87 lugged Stumpjumper that has rack and fender mounts and a fairly low BB as well.  Mine's a 59cm frame so the slightly bigger wheels will look more normal too.

I'm getting closer to having the canti mounts moved and repainted... 

~mike

[Minh]

Hmmm, I remember tom's bike from te rally and I thought he had hetres on it. At the tme it didn't even register, looked good, and he looked comfortable on te bike. I don't remember him having Paul's brakes though. Someone needs to ping Tom Nez. !

[Thomas Nezovich]

Back to the computer late today.    My 650B  Atlantis is  a 56 cm  made for 26" (559 bead seat diameter) wheels.  I really like it as a 650B bike.  I like it so much I acquired a 58 cm LHT ( 26 inch wheels)  for load em up touring duty.   I'm a little over six feet tall but long trunk and relatively short legs.

I really like the Hetres.   I was pleased they weren't too bad in the snow on the Riv Rally East this year.

Oh,  the brakes are Paul Moto BMX:  their v-brakes with the long smooth posts for greater adjustability  UP only.

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[Leslie]

Thx; good point on the Paul posts allowing the pads to slide UP; If I'd thought through more earlier, I'd hopefully have realized, a 700c would have to have the posts lowered, or switch to sidepulls which, isn't going to happen w/ an Atlantis)...

But, good to know, you can fender Hetres on it... That's good... w/o fenders, how big of a tire could you fit? Quasimotos?

[Peter Morgano]

In addition, wouldnt how low the BB is gonna go be an issue? I know Rivs have pretty low bbs to begin with so not sure if I would want to lower it another 3ish cm.

On Mon, Jul 9, 2012 at 9:03 PM, ilter <ilt...@gmail.com> wrote:

Leslie,

I was wondering the same, unfortunately a 700c-to-650b conversion seems unlikely with those Paul brakes. Does anyone know of a brake that would work ?

You can see the brake close-up in this (very large) photo of Tom N.`s Atlantis:
    http://www.flickr.com/photos/75638054@N03/6943765065/sizes/k/in/photostream/

To go from 559mm rim to 650b (584mm), brake pads move 12.5mm up.
To go from 700c (622mm) to 650b (584mm), brake pads move 19mm down.
Assuming all else is the same, pads need to move 31.5mm down from their position in the photo, but there seems to be not that much room :(

Btw, the brakes seems to Paul Motolite`s
    http://paulcomp.com/motolite.html

ilter

On Monday, July 9, 2012 7:33:52 PM UTC-5, Leslie wrote:

Yup, those are Paul's on it; I wonder if Paul's adjustability would help make a 700c-to-650b possible.... Hmmm....

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[johnb]

Anyone ever do it with a smaller one? I have a 52...

Though I just got the Compass 26" tires. They ride amazingly well.

[Leslie]

That's another good point, regarding the 700c ones...  Grant had recommended NOT doing a Ram, because of its low BB, and the 700c Atlantis looks to be lower than it.    Looking at the geo-charts at Rivbike, I started looking at the Hilsens, since it has a 650b version and a 700c version;  the smaller 700c ones have a really low BB, the bigger ones have a higher BB...  

So, yeah... 26" Atlantis can go 650b, but a 700c shouldn't, it seems....

On Tuesday, July 10, 2012 10:13:16 AM UTC-4, Peter M wrote:

In addition, wouldnt how low the BB is gonna go be an issue? I know Rivs have pretty low bbs to begin with so not sure if I would want to lower it another 3ish cm.

On Mon, Jul 9, 2012 at 9:03 PM, ilter <ilt...@gmail.com> wrote:

Leslie,

I was wondering the same, unfortunately a 700c-to-650b conversion seems unlikely with those Paul brakes. Does anyone know of a brake that would work ?

You can see the brake close-up in this (very large) photo of Tom N.`s Atlantis:
    http://www.flickr.com/photos/75638054@N03/6943765065/sizes/k/in/photostream/

To go from 559mm rim to 650b (584mm), brake pads move 12.5mm up.
To go from 700c (622mm) to 650b (584mm), brake pads move 19mm down.
Assuming all else is the same, pads need to move 31.5mm down from their position in the photo, but there seems to be not that much room :(

Btw, the brakes seems to Paul Motolite`s
    http://paulcomp.com/motolite.html

ilter

On Monday, July 9, 2012 7:33:52 PM UTC-5, Leslie wrote:

Yup, those are Paul's on it; I wonder if Paul's adjustability would help make a 700c-to-650b possible.... Hmmm....

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[Thomas Nezovich]

Leslie, the fenders are leftovers from the previous 26 inch tires. They were 26x1.75 Paselas and they ended up about 42 mm wide or about the same as the Hetres. I don't know about Quasimotos but the largest tires I had on the Atlantis when using 26 inch wheels were 50 mm Marathons which were near to 50 mm on Rhynolites.

On Jul 9, 2012, at 11:00 PM, Leslie wrote:

> Thx; good point on the Paul posts allowing the pads to slide UP; If I'd thought through more earlier, I'd hopefully have realized, a 700c would have to have the posts lowered, or switch to sidepulls which, isn't going to happen w/ an Atlantis)...
>
> But, good to know, you can fender Hetres on it... That's good... w/o fenders, how big of a tire could you fit? Quasimotos?
>

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[Steven Frederick]

Honestly, I don't get conversions like this.  Canti posts add complication to any conversion so that's one issue.  Also, the original intent of 650b conversions of road bikes was to add fat tire and fender versatility to an otherwise limited 700c-equipped bike, ie a low clearance, high BB racy/crit bike--trying to add versatility to a bike as versatile as the Atlantis seems an exercise in futility.  And messing about with something so perfectly suited to its intent and function, and designed by GP to boot seems almost sacrilege. 

There are plenty of bikes out there that can be improved by a conversion like this, but the Atlantis doesn't seem like one of them to me.  What's that old saw about just because you can does not mean you should...? 

Steve

[Thomas Nezovich]

In my case it was not so dire nor malicious. I really wanted to try Hetres and the Atlantis was the only one ( of around 10 bikes) that would fit them. Short of obtaining another frame, it was the choice.
I have often thought and said that if I had to live with only one bike ( oh my!), it would be the Atlantis with several wheelsets. My Atlantis is amazingly versatile and useful and I love it even more now that I can play with it as a 659b bike.

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[ekoral]

I'm a regular reader and a rare poster, but here it goes...

I've got my 53cm Atlantis set up with 650B's and Paul Motos. After ALOT of research it's really the only way I could figure out to do the conversion. My reasons were more because I like the ride of larger wheels. Personally, I think the feel of a larger tire is smoother and slightly faster. I also like to ride 32's and the bike was most probably (big assumptions here) intended for large 26"s. When I ride the 32 650B's it's much like riding 2.5" 26"s.

One problem I've had, however, is that once you put tires and fenders on it, the direct pull brake cross top part comes awfully close to the fenders, and even touches in the front. This completely eliminates trying larger tires on the bike. I couldn't imagine that Hetres with fenders would fit. Do they, anyone? 

Anyway,I've found that the Atlantis rides quite nicely when it rides a bit higher and the difference is hardly noticed, but noticed enough to change the ride. 

Eli

On Monday, July 9, 2012 12:01:52 PM UTC-7, Leslie wrote:

[Michael_S]

raising the bottom bracket a cm or so does not create much of a problem in my opinion. The braking situation is another matter, if you can't get good leverage with the brake set up you choose then I would not do it. Plenty of MTB bikes have been converted with many happy conclusions. Using a larger wheel helps with with rolling momentum and works better off pavement in my book. And you get to use a hetre...easy decision!

~mike  

[Leslie]

Steve,

I've got a 650b Bomba, so it's really a non-issue for me, too; it was just something that crossed my mind, and I was thinking out loud...

I suppose, as you said, the roadbike side, it's from wanting to run fatter tires than can be fit otherwise.  But over on MTBR and the like, the MTB world, they're doing 26"-to-650b conversions, trying to get a taller tire more like a 29er w/o having to switch frames....  

I'm liking 650b.  It makes sense to me.   My Ram, no, I'm keeping it as a 700c roadbike, but, I was looking at my old college-days Nishiki MTB the other day, wondering if I could put 650b on it, saw a Peugeot MTB on CL a month or so ago, was thinking about it, if it'd take a 650b...  

So, the gist of my original question, thinking of the Atlantis as a MTB and a roadbike both, was a combining of the MTB 26-to-650b and the roadbike 700c-to-650b questions into one question....


You're right, though:  a 700c to 650b isn't needed on an Atlantis, given the wide nature that it can take as a 700c.   Now, for a 26 to 650b, I now know its been done, successfully and well...  so, just in case I ever come across a used 26" Atlantis for a good price but would rather have it a bit bigger, that it might suit.... 


Anywho...