Bought a pair of this for my hpi sprint 2. Before i say anything else LOOK AT THE PRICE. For the price of a set of similar ones at my LHS i could buy like 3 to 4 sets of these. THEY ARE DIRT CHEAP. Not very grippy on tracks but perfect if ur looking at just bashing around. Only gripe is the inserts. They of a sponge material and really soft. Would have been better if they had harder rubber inserts. But at this price i really can't complain. GD JOB HK!!!!