To be honest spoolio I found some in my box. I think they were the solid front drive pins from nortech racing for the Cat sx. Any needle roller than fits through the hole and is longer than the kit pins is ideal. Just match the length to the maximum you can get into the slot on the wheel. Washers between the wheel and nut and also the epoxy in the area around the slots would ensure reliability. Probably overkill but will keep you running. Other than this the trucks seem bullet proof. Watch the diff for clicking too. May need extra shims. Out of the 3 that ran last night, mine was the only one that did it. Re shimmed it and its perfect now. You'll love it. It is totally different from anything I've driven. Surprisingly it is dialled from box settings and has great steering and grip.
