
Even still, the total width of the cassette is a little wider than a 10-speed cassette from these same manufactures (about 2 mm wider, I believe) and this prevents an 11-speed cassette from fitting on a 10-speed freewheel hub from the same manufacturer. The general problem is this: To create an 11-speed cassette, most component manufacturers (Shimano and SRAM, for example) had to use thinner spacers between the sprockets, moving the sprockets closer together.

If you are experienced with drivetrains and can tune a rear and front derailleur without problem, then the instructions provided by Lennard Zinn (follow the link in cruiserhead's post #2 ) will help you do that-if your hubs and other components are suitable (some are not). It is possible to modify the rear hub and/or cassette to fit a 10-speed wheel into an 11-speed drivetrain-but it's not something that a novice would want to tackle.

The answer to your question depends on the component manufacturer.
