RC Nitro Central or Amain Hobbies. Steve at RCNC is great to deal with and keeps a far range of parts. But in 18 months of running this truggy I have broken one arm and bent one front axle. Mad crash with an steel pipe. After I hit the pipe I was able to keep racing after I straightend the axle a bit to stop it hitting the shock, the arm was broken through the bracing but it held together for the rest of the days racing. These things are tough.replaced a couple of pinions but that was a result of bearings failing. The track that I was racing on was hard on bearings due to very fine dust.