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Ultegra 9-spd crankset OK with 8-spd 105 drivetrain?(4 posts)

Ultegra 9-spd crankset OK with 8-spd 105 drivetrain?killermustard
Mar 11, 2003 7:31 PM
I have a 97 Cannondale CAAD 3 with the 8-speed 105 gruppo. I figure that the best performance upgrade at this point would be the stiffer Ultegra crankset/BB.

The problem is that the Ultegra crankset is a 9-speed, so I assume it wouldn't be compatible with the 8-speed chain. If I replace the Ultegra's inner chainring with the inner chainring from my existing 105 8-speed crankset, would it work? Any other suggestions?
re: Ultegra 9-spd crankset OK with 8-spd 105 drivetrain?Uncle Tim
Mar 11, 2003 8:26 PM
Since the 9-speed chain is too narrow for the 8-speed setup, wouldn't you also have to replace the big ring?

It seems kinda pointless to me to buy a new Ultegra cranks and then replace the new chainring with your old ones.

You've got a good frame. A nine speed cassette will work on the back, but you'll have to buy new 9-speed shifters. The derailleurs can probably be made to work, but I've never tried that move.

BTW, a LBS manager told me that Shimano was going to 10 speeds in 2004. Rumors are flying.
re: An 8 speed chain works just fine!.......nmRusty Coggs
Mar 12, 2003 5:57 AM
I'm running 9spd rings on DA 8 spd crank w/8spd chain & cogsshawndoggy
Mar 13, 2003 7:36 PM
No problem, works like a champ.