View Poll Results: Shim it?
Yes
2
66.67%
No
1
33.33%
Voters: 3. You may not vote on this poll
Front derailleur shim, yay or nay.
04-13-11, 04:24 PM
#1
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Front derailleur shim, yay or nay.
Inner diameter, top pull normal, 34.9 to 31.8 i think.... Could this cause a problem for the small-ring on my triple? How about the chain-stay angle listing on the FD, could that cause an issue? We are talking $3 vs $30 and having another piece of equipment lying around!
04-13-11, 05:34 PM
#3
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your question is defective.
you ask shim yea or nay? so yes would mean it's OK to shim.
Then you ask whether shimming could cause a problem, so a yes would mean don't shim.
So what do you want yes to mean???
------------------------
Meanwhile using a shimmed bigger clamp shouldn't cause a problem, after all if you had a bike with the larger seat tube and similar chainline it should work.
Chainstay angle relates to the swing-arm of a rear suspension, and deals with whether it could swing high enough to bump the FD cage. If it's unrelated to your bike feel free to ignore it.
you ask shim yea or nay? so yes would mean it's OK to shim.
Then you ask whether shimming could cause a problem, so a yes would mean don't shim.
So what do you want yes to mean???
------------------------
Meanwhile using a shimmed bigger clamp shouldn't cause a problem, after all if you had a bike with the larger seat tube and similar chainline it should work.
Chainstay angle relates to the swing-arm of a rear suspension, and deals with whether it could swing high enough to bump the FD cage. If it's unrelated to your bike feel free to ignore it.
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Chain-L site
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Just because I'm tired of arguing, doesn't mean you're right.
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FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
04-13-11, 05:46 PM
#4
Senior Member
Stop and think what a shim does. It allows you to install an oversize derailleur on a tube so that it keeps the same center line position as the correct size derailleur.
Apparently in some models Shimano is now selling only one oversize FD that comes with a set of shims to adapt it to smaller tubes. Obviously they could not do this if shims had any effect on the shifting.
Apparently in some models Shimano is now selling only one oversize FD that comes with a set of shims to adapt it to smaller tubes. Obviously they could not do this if shims had any effect on the shifting.
04-13-11, 08:12 PM
#5
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Last front derailer I got from the LBS required a shim. The shop guy found one (official Shimano FD shim) that supplied the necessary diameter increase and sent me on my way.
04-14-11, 04:45 PM
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Stop and think what a shim does. It allows you to install an oversize derailleur on a tube so that it keeps the same center line position as the correct size derailleur.
Apparently in some models Shimano is now selling only one oversize FD that comes with a set of shims to adapt it to smaller tubes. Obviously they could not do this if shims had any effect on the shifting.
Apparently in some models Shimano is now selling only one oversize FD that comes with a set of shims to adapt it to smaller tubes. Obviously they could not do this if shims had any effect on the shifting.
your question is defective.
you ask shim yea or nay? so yes would mean it's OK to shim.
Then you ask whether shimming could cause a problem, so a yes would mean don't shim.
So what do you want yes to mean???
------------------------
Meanwhile using a shimmed bigger clamp shouldn't cause a problem, after all if you had a bike with the larger seat tube and similar chainline it should work.
Chainstay angle relates to the swing-arm of a rear suspension, and deals with whether it could swing high enough to bump the FD cage. If it's unrelated to your bike feel free to ignore it.
you ask shim yea or nay? so yes would mean it's OK to shim.
Then you ask whether shimming could cause a problem, so a yes would mean don't shim.
So what do you want yes to mean???
------------------------
Meanwhile using a shimmed bigger clamp shouldn't cause a problem, after all if you had a bike with the larger seat tube and similar chainline it should work.
Chainstay angle relates to the swing-arm of a rear suspension, and deals with whether it could swing high enough to bump the FD cage. If it's unrelated to your bike feel free to ignore it.
04-14-11, 04:50 PM
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