Mar 18, 2002 12:17 PM
|Is record 9-speed ergo/derailleurs compatible with dura-ace cassette? Does it require any spacers etc?
|No, there is no compatibility...||Pedal Jockey|
Mar 18, 2002 12:28 PM
|The spacing of Shimano 9-speed is different enough from Campy 9-speed that it inhibits smooth shifting. If you need a cassette for Campy 9-speed to fit on a Shimano splined hub, I'd suggest using a Wheels Manf. cassette. They can be found at Branford Bike.
|There are differing opinions||TJeanloz|
Mar 18, 2002 12:35 PM
|And they will become evident here. Our shop always had good luck making ergo levers work with Shimano 9 cassettes. I like to think that our mechanics were really good, but that probably wasn't the only reason it worked.
We had some customers who claimed that the Shimano cassette/chain worked better with their ergo levers than a Campy cassette. As another bit of evidence, Mavic says that Mektronic is fully compatible with either cassette- with no changes to the derailluer.
But some people have a mathmatical proof that it will never work. And they will never believe that it will work 'well'. I think that on some bikes, due to fluctuations in chainline, chainstay length and crank setup, it really doesn't work well- you'll just have to try for yourself.
|re: campy/shimano compatiblity||slow-ron|
Mar 18, 2002 12:38 PM
|I've heard that it will work without any different spacers but the shifting won't be perfect.
Here's what I did, I used a new ultegra cassette that I bought on ebay for $30 and made my own spacers on the lathe. The new spacers need to be .109" thick to equal campy 9 speed spacing. The problem is that with the wider spacers the 9th cog doesn't fit on the freehub. What you end up with is an 8 speed Shimano cassette spaced for 9 speed campy shifters. Another problem with the set up is that the largest three gears are pinned together and ride on a carrier. These can't be easily modified. The next two gears are also pinned but these come apart easily. It would be better to use a loose cog Shimano 105 cassette to make the modifications.
Or, if you want to spend $100 you can buy one of the "Wheels Manufacturing" cassettes that do everyting I mentioned above.
BTW, I only have 100 miles on the set up but the shifting has been perfect. I'm also using an SRAM PC89 chain. I don't think you can use the Campy 9 speed chain.
Mar 18, 2002 2:46 PM
|The cog spacing on shimano 9 speed is 4.32mm. Campy 9 speed cog spacing is 4.55mm. The spacing difference is 5% per cog.
The best shifting that you can get requires the rear derailleur to be aligned as closely as possible on the center cog, to distribute the spacing error equally between up shifts and down shifts. The accumulative error will still be 20% in both directions, on the 4th shift. If the derailleur isn't adjusted properly, the error could accumulate to 40%.
Late model cassette have most of the cogs riveted together in groups that make it difficult to respace. Even if you use a loose-cog cassette and purchase new spacers, Shimano's casette body is too short. The lockring threads won't engage.
A better solution is to buy a wheels manufacturing cassette from excel sports, which has the proper spacing ($100) or stick with all campy parts.
|9 speed dura ace is close enough for chorus||Pack Meat|
Mar 18, 2002 3:34 PM
|I used shimano wheels and a dura ace cassette with 2001 Chorus 9 speed all last season and never missed a shift.|
|Shimpagnola? Camano? Chora-Ace? Dura-Record? Why? [nm]||Ahimsa|
Mar 18, 2002 4:47 PM
Mar 19, 2002 7:25 AM
|You may, for some reason, want to use wheels that are only available in Campy/Shimano versions on your Shimano/Campy bike. Many styles of wheels come in only one or the other. Maybe your buddy has a Shimano disk you want to borrow for a TT, but you have a Campy bike. I can think of tons of reasons. |
FWIW, my ex-girlfriend bought a Shimano 8-v DA bike (this is years ago) and ran Campy Vento wheels with a Campy cassette. It worked fine. She never rode it enough, but when she did, it shifted everytime. I always hated those wheels. They looked cool, but rode like rails and flatted all the time.