ive run them all at hillclimbs and in the trails. NO tire i have found yet out performs kenda knarlys. razr2 are heavy and take more shit to turn them. kenda klaw are not bad but the lugs are not far enough apart to get a real good bite. they like to bury in any kind of sloppy shit. knarlys have a good space in between the lugs, they are light weight compared to the razr2 and they are much cheaper. ive ridden them on the roads at my house, hillclimbs, trails, creek and snow. like i said, no other tire performs better and trust me ive tried them all...