Flipping a chain ring on a granny gear to foil developing chain suck
Fritz
I started to experience chainsuck on the granny gear of my triple
ultegra nine speed crank.
So, I flipped the granny gear over and installed washers between crank
and ring to get the spacing right.
I have not ridden the bike yet with this repair so I would appreciate
any thoughts pro or con. I would hate to make things worse.
Thanks!
landotter
If the cause is a fairly fresh chain on a worn ring--you should be
good to go. Ride and see how you fare. ;-)
thirty-six
Should be good. One thing is always to keep your chainring fixings
together, do not mix them up. If you end up mixing nut and bolt then
there is the possibility of a slight mismatch (at least there used to
be) and the risk of seperation on the road increases. Use threadlock
or wire them (until you are certain they remain secure) so you dont
lose the fixings.
_
> One thing is always to keep your chainring fixings
> together, do not mix them up. If you end up mixing nut and bolt then
> there is the possibility of a slight mismatch
This is nonsense.
Screw threads were one of the first targets of part interchangability, and
claiming the above is alarmism of beamian nature.
semi-ambivalent
wrote:
On the other hand, I experienced chain suck on a ride last summer and
when I stopped I found that one of the chainring bolts was loose and
two adjacents were gone completely. Boy, had I gotten lazy about the
pre-ride checks. This was on a 98-ish Campy 9-spd Record crank. Not
too far from home so I got away with the price of new bolts, a lesson
I won't forget and some paint damage on the chainstay (yea, steel!) As
regards the OP, a wire loop through the bolts sound like a great idea
if I was a tourist and a looong way from anyplace, like in Namibia or
Utah. No different than the wires I've seen used on castellated nuts
in sundry bearing assemblies. But, if you're all lycra-ed up, doing
something like that would certainly break your mojo.
sa
thirty-six
wrote:
Despite Whitworth standardisation of screw threads, mismatches do
occur with chainring fastenings. I'm not certain of the precise cause
because those bolts I've lost, I've lost, and that is despite making
sure that they were tightened fully. It could be that the threads
were bottoming out and so felt tight when in fact it was simply that
the end of the thread had been reached and so movement of the
chainring would unscrew the bolt.
_
a) if that (bottoming out) were the case then keeping a nut and screw
together would not prevent it;
b) you seem to have slid from "do this or else" to "I'm sure of the cause";
and
b) it's a poor workman that blames his equipment.
thirty-six
wrote:
> a) if that (bottoming out) were the case then keeping a nut and screw
> together would not prevent it;
Keeps successfully working pairs together.
> b) you seem to have slid from "do this or else" to "I'm sure of the cause";
> and
Misquote.
>
> b) it's a poor workman that blames his equipment.
learning the alphabet before posting may help.
_
> On 23 Dec, 19:56, _ <jtayNOSPAM...@hfDONTSENDMESPAMx.andara.com>
> wrote:
>
>> a) if that (bottoming out) were the case then keeping a nut and screw
>> together would not prevent it;
>
> Keeps successfully working pairs together.
a) all pairs work; and
b) you are "...not certain of the precise cause because those bolts
(you)'ve lost, (you)'ve lost."
>
>> b) you seem to have slid from "do this or else" to "I'm sure of the cause";
>> and
>
> Misquote.
True - from "Do this or else" to (as above) "I'm NOT sure of the cause".
Thanks for pointing out that out; it does your argument no favour.
>>
>> b) it's a poor workman that blames his equipment.
>
> learning the alphabet before posting may help.
On usenet, attacking spelling and similar keybpoard errors of a post is
often an indicator that the replying poster has no other support.
thirty-six
wrote:
> On Wed, 23 Dec 2009 12:29:01 -0800 (PST), thirty-six wrote:
> > On 23 Dec, 19:56, _ <jtayNOSPAM...@hfDONTSENDMESPAMx.andara.com>
> > wrote:
>
> >> a) if that (bottoming out) were the case then keeping a nut and screw
> >> together would not prevent it;
>
> > Keeps successfully working pairs together.
>
> a) all pairs work; and
>
if you mix them up, sometimes they don't and you lose them on the
road. Using a threadlock or wire although not addressing the cause
does prevent the loss of the fixings. The loosewmned fixings can be
swapped around until they stick.
> b) you are "...not certain of the precise cause because those bolts
> (you)'ve lost, (you)'ve lost."
>
>
>
> >> b) you seem to have slid from "do this or else" to "I'm sure of the cause";
> >> and
>
> > Misquote.
>
> True - from "Do this or else" to (as above) "I'm NOT sure of the cause".
> Thanks for pointing out that out; it does your argument no favour.
>
Misquote again.
_
> On 24 Dec, 17:37, _ <jtayNOSPAM...@hfDONTSENDMESPAMx.andara.com>
> wrote:
>> On Wed, 23 Dec 2009 12:29:01 -0800 (PST), thirty-six wrote:
>>> On 23 Dec, 19:56, _ <jtayNOSPAM...@hfDONTSENDMESPAMx.andara.com>
>>> wrote:
>>
>>>> a) if that (bottoming out) were the case then keeping a nut and screw
>>>> together would not prevent it;
>>
>>> Keeps successfully working pairs together.
>>
>> a) all pairs work; and
>>
>
> if you mix them up, sometimes they don't and you lose them on the
> road.
But you have already stated that the cause of you loosing your bolts is
unknown to you - so you cannot state that they were lost because they did
not "work together". Indeed, when you tightened them you thought they were
fine - surely an experienced cyclist such as yourself, who knows such
things as
a) tying and soldering spokes prevents wheels from failing;
b) spokes that cross and are not soldered will wear deep gooves;
c) the majority of cyclists have exceeded 60 mph; and
d) it is not permitted to cycle in the UK with tyres that have no tread.
Of course, if you were wrong about those four, maybe you are also wrong
about the reason your bolts fell out.
thirty-six
ric
never try to teach a pig to sing. it wastes your time and it annoys
the pig.
Chainsuck occurs when a chain is worn.
_
Yes, I suppose I should know better - Trevor's wacky ideas have been
floating around long enough that most readers will recognize yet another
one for what it is. He's not shy about promoting them, that's for sure.
Tom Sherman °_°
>
> Yes, I suppose I should know better - Trevor's wacky ideas have been
> floating around long enough that most readers will recognize yet another
> one for what it is. He's not shy about promoting them, that's for sure.
>
--
Tom Sherman - 42.435731,-83.985007
I am a vehicular cyclist.
Tom Sherman °_°
> [...]
> never try to teach a pig to sing. it wastes your time and it annoys
> the pig.
> Chainsuck occurs when a chain is worn.
I had chain suck on my MTB with an almost new chain after bashing the
chainrings on a log crossing. The chain suck went away after I replaced
the granny ring.
Kerry Montgomery
"Tom Sherman �_�" <twsherm...@THISsouthslope.net> wrote in message
news:hh7tr6$o0a$2...@news.eternal-september.org...
Tom,
Woulda thought the big ring, though.
Kerry
thirty-six
wrote:
So did you replace it with a full set of dentures or another gummy
ring?
AMuzi
>>> [...]
>>> never try to teach a pig to sing. it wastes your time and it annoys
>>> the pig.
>>> Chainsuck occurs when a chain is worn.
> "Tom Sherman �_�" <twsherm...@THISsouthslope.net> wrote
>> I had chain suck on my MTB with an almost new chain after bashing the
>> chainrings on a log crossing. The chain suck went away after I replaced
>> the granny ring.
Kerry Montgomery wrote:
> Woulda thought the big ring, though.
It's almost always the smallest one which exhibits 'suck'.
Middle rings wear out more commonly because they are
generally used most, but those exhibit truncated teeth and
the chain simply slides over the stumps, doesn't 'stick'.
--
Andrew Muzi
<www.yellowjersey.org/>
Open every day since 1 April, 1971
Tom Sherman °_°
>>> ric nolastname wrote:
>>>> [...]
>>>> never try to teach a pig to sing. it wastes your time and it annoys
>>>> the pig.
>>>> Chainsuck occurs when a chain is worn.
>
>> "Tom Sherman �_�" <twsherm...@THISsouthslope.net> wrote
>>> I had chain suck on my MTB with an almost new chain after bashing the
>>> chainrings on a log crossing. The chain suck went away after I
>>> replaced the granny ring.
>
> Kerry Montgomery wrote:
>> Woulda thought the big ring, though.
>
> It's almost always the smallest one which exhibits 'suck'.
Exactly - I only had chain suck when using the granny ring while climbing.
Fritz
I am the original poster for this thread and I can happily say that
after putting on 100 miles or so on my flipped ultegra triple granny
gear I have experienced the joys of having no more chain suck! YAY!
Even though the spacing is a bit wider between the granny and middle
ring now (I put washers between the bolts crank arm and the ring) I
am still happy with my upshifts. Maybe I can eek out another 15000
miles before replacing the ring.
Saved myself 20 bucks!
thirty-six
> On Mon, 28 Dec 2009 19:55:03 -0600, Tom Sherman _
>
>
>
> <twshermanREM...@THISsouthslope.net> wrote:
> >Andrew Muzi wrote:
> >>>> ric nolastname wrote:
> >>>>> [...]
> >>>>> never try to teach a pig to sing. it wastes your time and it annoys
> >>>>> the pig.
> >>>>> Chainsuck occurs when a chain is worn.
>
> >>>> I had chain suck on my MTB with an almost new chain after bashing the
> >>>> chainrings on a log crossing. The chain suck went away after I
> >>>> replaced the granny ring.
>
> >> Kerry Montgomery wrote:
> >>> Woulda thought the big ring, though.
>
> >> It's almost always the smallest one which exhibits 'suck'.
> >> [...]
>
> >Exactly - I only had chain suck when using the granny ring while climbing.
>
> I am the original poster for this thread and I can happily say that
> after putting on 100 miles or so on my flipped ultegra triple granny
> gear I have experienced the joys of having no more chain suck! YAY!
>
> Even though the spacing is a bit wider between the granny and middle
> ring now (I put washers between the bolts crank arm and the ring) I
> am still happy with my upshifts. Maybe I can eek out another 15000
> miles before replacing the ring.
>
> Saved myself 20 bucks!
Thought as much.