I had boxes full of 8 sp parts and sold them all because of incompatibility issues. Now, I'm using 10 sp until they muck that up.
Originally Posted by
rodri9o
Regarding interchangeability...all 8-speed should be compatible with the different freehub body versions of itself. The 9sp shift levers will not be compatible with the 8sp levers, but you can replace the cam to make it compatible with the gear number you want (8,9). I have yet to open up a set of 10sp levers though, so I'm not too sure what they look like inside....probably the same with a few modifications as the 8 and 9sp models.
True
Originally Posted by
rodri9o
I would think you can use a 9sp rea derailleur on the 8 speed drivetrain as long as you swap over the pulleys...I'm not sure how much more narrow the rear der. cage is on the 9sp from the 8sp.
True and false, 9 sp and 8 sp use the same actuation ratio until 2001. 2001 and newer 9 sp and 10 sp are different than earlier 9 sp. That's why Campy makes 2 different 9 sp Ergo gears.
The pulleys are the same, the spacers are narrower on 9 sp and narrower still on 10 sp. The bolts are also shorter. If you swap the spacers without shorter bolts, they will stick out the back of the cage.
Originally Posted by
rodri9o
Front derailleur comes with an insert to make the cage narrower as well...never tried to pop that off either, nor have I used it with an 8sp drivetrain.
8 sp and 9 sp don't need the spacer only 10 sp.
Originally Posted by
rodri9o
I'm not sure on the 8sp compatability with the freehub body, but I think my hubs are compatible with 9 and 10...same hub body...its a 10sp campagnolo group and I got it a short time after it was first introduced, and never tried putting an 8sp cassete on it, exa or not.
9 and 10 sp use the same splines. If you look, you'll see they use 4 really deep grooves. The old 8 sp used 8, or 6 can't remember, shallow grooves. They aren't compatible.
You can upgrade 8 sp to 9/10 by swapping cassette hub bodies. All Campy 8 sp hubs from Mirage to Chorus used the same axle, bearings, cones and cassette hub body. Simply use a current Veloce 10 sp body for the swap. Cost is about $75 as a year ago. I' done the swap on a set of Chorus wheels for $100 including labor and wheel truing. That's a lot cheaper than a set of new Chorus wheels.
Record used an oversize axle and special aluminum cassette hub body. It's very expensive to convert. IMO, buy a new Record hub and have it laced to your rim.
Good luck on your project. If it were me, I would sell the 8 sp parts on ebay. Campy 8 sp is getting very rare and expensive. Nice brifters go for upwards of $100. Really clean rear can go for $50 - $100. Record for lots more.
Tim