?This set of stabilizers assist young learners until they have developed a usable sense of balance on the bicycle. Improve your child's safety and confidence without holding the back of the saddle .
?Wheels diameter:4.33 inch. Universal training wheels fits for 12/ 14/ 16/ 18/ 20 inch children's bicycles. Tips: For Single Speed Bikes Only (Cannot Be Installed On Bikes with Derailleurs)A few bicycle axles less than 0.8 inches will not fit and Supports Riders up to 100 Pounds .
?These bicycle training wheels are made of high quality plastic and rubber which it is anti-slip, wear resistant, providing stability and help children to ride a bike without fear. Light weight and noiseless.
?Easy to install, all mounting hardware and installation instructions is included, you will have more choices to adjust the height.