The rims, spokes and free-hub are all available separately and not hard to obtain. Special tools required are none, assuming you still have the spoke wrench which came with the wheels and a wheel truing stand. However, if you don't have much experience in building wheels, I wouldn't necessarily do a Ksyrium as my first build.Kram59 said:You could contact Mavic and see about purchasing just the rims. I would imagine, even if it was possible, that it would PROBABLY be cheaper to buy a new pair. My rear needs a new free-hub body, which my lbs says is no big deal and not a lot of $$ (they have LOTS of miles on them).