Do do you have a 10spd wheel available to try it? What kind of rear derailleur do you have? Depend on what your trying to do you may not notice a huge difference in the smoothness of shifting between an 8spd and 10. Also be careful you not asking your RD to do more than it is capable of.
Originally Posted by
20grit
Are you sure the 6 speed is a cassette? If it's a freewheel instead of freehub, then a cassette isn't going to work.
You will probably need a new chain.
Even if it is a cassette the OP will need a new wheel or at the very least a free hub body and axle swap to fit a 10spd cassette.