After purchasing a set of Afterburns at the Somerset GNCC I got em mounted up and headed west to Southern Ohio where the John Penton GNCC would be held. The ground here is nothing but stickly clay and when its muddy almost nothing would help but pure momemtum......Till now! I got a great jump off the line with these tires, in fact its the best GNCC start ive ever had!, and it didnt take but half a lap when i came to a bottleneck where off to the right there was a hill that 2 riders were trying to get up and get around this mess. I picked my line and throttled hard and without hesitation the Afterburns dug in to the clay surface and propelled me up the hill no problem! Countless other times i blasted by people up hills all day and even with little to no running room these tires performed! If you ride anywhere it gets muddy and slick, You Will LOVE these tires. O yeah and cornering isnt compremised either. This is a great Tire and I wont even think about running another tire if theres a chance of mud! and at around $65 a peice, you cant go wrong!