buddy of mine gave me a set of 954 wheels. i just got my rear brake bracket back from the welder and was going to put the 954 wheels on because it has a better tire. from what i know they are neer identical. when i tried to put it on it was to wide and the sproket was loose and was almost falling off the rim. so after many curse words i decide to try my other wheel. it goes on with out any problems. WTF? am i just missing something or do i need different bearings or cush drive? thanks for the help.