And the cost of tires is mainly why I dont run mod motors, lol. Tires are not cheap and I cant/want to afford to replace them every weekend. For the casual racer Losi Silver compound with give good traction and last a while. I ran a pair of new holeshots and a pair of worn silver stud on my b4 a few weeks ago, and to be honest, I preferred the Silver studs. I felt they were more consistent across the wet and dry sections of the track. Its not the "best" tire for the track I am sure, but its a club race, not nationals.