Those are HPI Nubz, they come pre-mounted on rims. I raced it for the first time today and I was fast. I must agree that it seems a little nose heavey, but that is easy to fix with the quick blip of the throttle. I had bad luck in the main and this crappy mammoth driver blowed into me taking me out. I broke the outer pivot shaft or whatever you call it that hold the bottom of the knuckle ot the arm. I just slid an allen wrench into it and went back out for my revenge on that mammoth I thought the arm was busted for sure after that hit, but just that cheap little shaft\pin. i can see a need for a TiNi upgrage here. Overall very pleased with it. Missed the A main by 1 spot, I started first in the B. Not bad for a first race.

suspention components are awesome. from what ive been reading,the steering servo is crap.just ordered a high tec metal gear hi tourque servo.too cold to run it today when i got home from work. hope to run it later on this week. ill keep ya posted