Bike USA Inc's Junior Stabilizer Wheel Kit for Youth 20-Inch Wheel BMX Bikes, Heavy-Duty BMX Training Wheels. Heavy Duty BMX Training Wheels for 20-Inch BMX Wheel Bicycles, boys or girls frame Heavy-Duty Steel Tubing to Support over 200lbs! Do not settle for unsafe universal axle mounted training wheels This kit mounts to the bike frame, not the weak axles. Best Stability Control For Any Age Youth Our BMX training wheels use actual bike axles, tires, and tubes. Safest child bike trainers on the market! Step-by-Step Easy to read install instructions with photos. Can be removed at any time!