my brother has a t-rex spec 2 and he has had no problems and he has rode the british and world champs on his and the only thing that goes wrong with it is mech hanger snapping and bending so watch out for that when side hopping and other tricks like that also thay come with xt hubs and it started sliping alot my brother has changed that to the new pro2 hub and has no problems since hope that helped p.s. if you snap it tell me because i have never heard of one snapping