I've already ran them a couple of times. They don't seem to grip as well as the MC primes we run at our track, but it's still enough grip that I can keep up with the 4wd buggies. I'll be at the track with them again tonight and this time I'll try putting on traction compound to see if I can get them to grip even more. I do like them much better than the stock tires that came with the truggy.