Well I placed the order for a set of Motoz Terrapactor S/T's for my 09 TXC 510. The stock tires although new suck at least the rear so on with the new Terrapactors front and rear. Well....these tires rock! The bike now power wheelies and grips like a cat in a pine tree! My son tested them with a standard 2nd gear standing start blast off. Well he had to roll off to keep the front from passing the rear by going over him. Before the new Terrapactors we cound just pull in the clutch put the bike in second and let it eat. Now you have to feed it throttle and release the clutch s l o w l y or wear the bike for a hat. Well you get the picture they hook front and rear. The bike feels much better. Thanks Kelly.