We bought these training wheels for my son's Monster Moto MM-E250 Classic e-Mini. These training wheels are attached to a bracket to which the footpegs are attached. The bike is very stable with these training wheels. My son is four and rides his Monster Moto E250 with these training wheels with no problem. The support wheels are very well made and designed for high loads. My son is so happy that he can now ride alongside his big brother when riding his Razor SX500 McGrath Dirt Rocket Electric Motocross Bike.