Product Description – Variable-length training wheels: These training wheels are adjustable to fit bicycle sizes from 20” to 26”. – This set of stabilizers assist young learners as well as adult riders until they have developed a usable sense of balance on the bicycle; improve your safety and confidence without holding the back of the saddle. – These bicycle training stabilizers are designed with a reinforced structure frame, heavy-duty anti-slip rubber wheels, and anti-loose rubber on the nuts to avoid nuts loosening. – These training wheels are for riders weighing up to 220 pounds. – This set includes training wheels, mounting hardware, and user manual. NOTE: May does not work on Electric Bikes, Beach Cruisers, and some Variable Speed bikes with DERAILERS, ensure there is a mounting point for extenders to be installed. May not fit Nel Lusso or Huffy Cranbrook type of bicycle, or any bicycle that uses Chain Guard. Brand: Unbranded