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Will Shimano 10 spd...(10 posts)

Will Shimano 10 spd...hawayyan1
Dec 17, 2003 10:40 AM
cassette work with Campy 10 spd shifters/derailleur?
Thanks
not very well...C-40
Dec 17, 2003 1:41 PM
The spacing on shimano 10 is about the same 5% per shift less than campy spacing (3.95 vs. 4.12mm). The campy derailleur will accumulate a minimum 20-25% positioning error at either end of the cassette, IF the derailleur is perfectly adjusted.
Thanks, darn it !! nmhawayyan1
Dec 17, 2003 3:16 PM
re: Will Shimano 10 spd...MShaw
Dec 18, 2003 8:58 AM
If C9 shifters work on S9 cassettes, it stands that C10 shifters will work on S10 cassettes.

Try it and see before you take the advice you get on the internet.

Mike
your advice is on the internet too...C-40
Dec 19, 2003 5:02 AM
A campy 9 drivetrain doesn't work that well a shimano 9 cassette. The posisioning error is a minimum of 20% after 4 shifts and it requires readjustment of the limit screws to reduce the over-travel.

I didn't say it would not work at all, just that there is the same obvious overshifting condition present, because the campy cog spacing is wider than shimano's.

It's always beneficial to understand the problem that you're dealing with when trying adjust the derailleur. At least from this information, it's obvious that the deralleur needs to be centered on the middle portion of the cassette to minimize the error and the limit screws will also need to be adjusted to reduce the error. Same problems that occur using a campy 9 drivtrain with a shimano 9 cassette. Beats going into the situation uninformed.
your advice is on the internet too...jimPz
Dec 19, 2003 8:37 AM
I always see that 5% error posted when people ask if Campy drivetrains will work with Shimano wheels/cassettes. I've done this on 3 bikes, a Cannondale, a Ti Giordane & my current Prince, I interchange a Mavic/Shimano wheel with a Campy Eurus. No adjustments & both wheels work perfectly.
remember, the top pulley on rear der. 'float' & this probably covers some of that error.

JimPz
not correct...C-40
Dec 19, 2003 9:23 AM
The two wheels with different cassettes may complete all 9 shifts, but it CAN'T be perfect shifting, bacause the spacing is not the same.

The top pulley only has enough float to cover the error on one shift. The accumulated error is equivalent to about 3/4 turn on the cable adjuster after 4 shifts. My campy 10 bikes would shift like crap if the cable adjuster was off 3/4 of a turn.

The 5% value is a no-brainer. Campy 9 spacing is 4.55mm and Shimano is 4.32. Divide 5.32 by 4.55 and you get .95 or 95%. After 4 shifts either direction from the center, the error accumulate to .92mm which is a long way from where it's supposed to be.

If the derailleur is positioned directly under the first cog, the error would accumulate to 40% or 1.84mm by the 8th shift, so special adjustment IS needed to keep the error to a minimum.

If you've swapped campy and shimano wheels wihtout adjustment, it has to be pure dumb luck for the middle cog to be that close to the same position, or you're not very picky about shifting precision.
agreedivve
Dec 20, 2003 1:50 AM
I even notice an alignment difference when I switch wheels between a Record rear hub and Mavic FTS-L. The latter in my case always seems slightly more toward the inside/center.
not correct...MShaw
Dec 21, 2003 11:10 AM
I never can understand why some people just can't get the C9/S9 or C10/S10 shifting thing to work. It isn't THAT hard.

Heck, my friend's C10 shifted his S9 wheel perfectly too. I know, I was the mechanic that set it up.

All I gotta say, is if you haven't done it, try it before you say "it ain't gonna work." Like a lot of things in this world, bench testing just don't prove everything.

Re: shifting precision. Push the button. It shifts, stays in gear, and doesn't make noise. What's more to worry about?

Mike
your advice is on the internet too...MShaw
Dec 21, 2003 11:13 AM
Yeah, I know my advice is on the internet. I just don't take what I say too seriously...

My favorite response in most situations is: f$%k 'em if they can't take a joke!

Mike