For riders up to 100 lbs. includes tools needed. Introducing the perfect companion for your Guardian Bike: Guardian Training Wheels. Specially designed for all single-speed Guardian Bikes, these training wheels ensure a seamless, hassle-free experience. With our innovative, tool-free screw-in design, you can install, remove, and re-install them in just minutes. Give your child the confidence to ride safely and enjoy every moment with Guardian Training Wheels.