The wheels I have laced I have never been able to save all of the old spokes. Even then they have wear plus the rust on the threads. Much better to buy new and be done with it. Pain in the rear cleaning up old spokes. Makes the build up go faster with new ones too. The last set of wheels and spokes I purchased (ProCycle) I let them do the lacing. Easier yet! I am getting lazy in my old(er) age!