Training Wheels - CRF50/XR50 Provide a more stable ride until understanding of the fundamentals is reached, Teach the basics of braking, throttle control, and steering, Adjustable and adaptable for rider's skill level and terrain, 8" pneumatic, rubber, 4-ply wheels with grease fittings, Sealed bearings and hardened fasteners, Include step-by-step instructions, Easily mounts to footpegs/frame, Solid steel axle, Failure to use this apparatus correctly can result in serious injury or death. Only use Moose Racing training wheels for the intended training purpose. This is only a training aid!