Review on Upgraded Heavy Duty Rear Bicycle Stabilizers Kit with Stronger Version Training Wheels for Boys and Girls - Fits 12, 14, 16, 18, and 20 Inch Bikes by Patrick Nepal

You may not be able to handle an Evil Knievel bike kid, but I think they will last a learning curve. I had to machine out two flat spots on the forged rear axle washers our bike had so they could fit behind the steel U-bracket of the jockey wheelset. You may also need additional shims to adjust things a bit. The free whore won't really help, as you may need a decent ratchet wrench or long-handled wrench to loosen the bike's tightened axle nuts. When installing, be sure to fit the small tabs on the two small silver pieces into the axle slots on the bike frame. These tabs prevent the mounts from moving forward or backward if you hit them while riding.