Changing to smallest rear cot chain hitting the frame

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Changing to smallest rear cot chain hitting the frame

Postby applio » Sat Aug 30, 2014 1:45 pm

After watching few YouTube and some how to, finally I manage to adjust the gear properly myself, however when I change to the smallest cot of the rear gear, the chain just hitting the bike frame, I'm pretty sure I adjust everything right, I have no problem with a smooth gear switching after the adjustment, just the problem with the smallest cot, the group set I running is a 10speed chorus.

The other problem I also getting is the crank noise, I running a rotor system crank set, when my left foot on 6 o'clock and right foot on 12 o'clock, I hear clicking noise, I had check and tighten all the screw, but noise just keep coming.

Thx for any advice.


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by BNA » Sat Aug 30, 2014 7:53 pm

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Re: Changing to smallest rear cot chain hitting the frame

Postby KGB » Sat Aug 30, 2014 7:53 pm

Wind in the limit screw, a quarter turn at a time until the chain isn't touching the frame.

Hopefully this will fix it but quite probably won't... Give full details of the setup (frame, hub/wheel, cassette).
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Re: Changing to smallest rear cot chain hitting the frame

Postby KGB » Sat Aug 30, 2014 7:54 pm

Crank noise when right foot passes through the top? Check the crank isn't touching the fr derailleur.
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Re: Changing to smallest rear cot chain hitting the frame

Postby applio » Sat Aug 30, 2014 8:55 pm

KGB wrote:Wind in the limit screw, a quarter turn at a time until the chain isn't touching the frame.

Hopefully this will fix it but quite probably won't... Give full details of the setup (frame, hub/wheel, cassette).


Seems nothing to do with the adjusting screw, because is the top part of the chain hitting the axel, will post some photo later on


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Re: Changing to smallest rear cot chain hitting the frame

Postby applio » Sat Aug 30, 2014 8:56 pm

KGB wrote:Crank noise when right foot passes through the top? Check the crank isn't touching the fr derailleur.


Is quite when free spin, noise only comes up when there is load on the bike


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Re: Changing to smallest rear cot chain hitting the frame

Postby munga » Sat Aug 30, 2014 9:19 pm

need photos for any kind of useful help.
pitty43 wrote:Thanks all for your help. Better change my Gumtree add now.

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Re: Changing to smallest rear cot chain hitting the frame

Postby applio » Sun Aug 31, 2014 1:04 am

Here is the photo

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Re: Changing to smallest rear cot chain hitting the frame

Postby greyhoundtom » Sun Aug 31, 2014 7:56 am

No wonder the chain is hitting the frame :shock:

Time to let an experienced bike mechanic have a look at that wheel/cassette setup. :?
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Re: Changing to smallest rear cot chain hitting the frame

Postby Duck! » Sun Aug 31, 2014 11:39 am

What sort of vintage rame is it? Campag 10-sp. cassettes are pretty wide, and if it's a frame built for 8 or 9-sp then you're going to find the tolerances very tight.
I had a thought, but it got run over as it crossed my mind.
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Re: Changing to smallest rear cot chain hitting the frame

Postby applio » Sun Aug 31, 2014 2:21 pm

Duck! wrote:What sort of vintage rame is it? Campag 10-sp. cassettes are pretty wide, and if it's a frame built for 8 or 9-sp then you're going to find the tolerances very tight.


The frame is a Columbus compex frame, I guess I just stick with the 9 speed


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Re: Changing to smallest rear cot chain hitting the frame

Postby BianchiCam » Thu Sep 04, 2014 7:59 pm

Either that or a spacer.
Were you running 9 speed before?
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Re: Changing to smallest rear cot chain hitting the frame

Postby KGB » Thu Sep 04, 2014 9:43 pm

What size is the smallest cog?
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