Hi, you are looking for a pair of caster (PU) wheels Those can fit the most Pride, Jazzy, Quantum, Merits and other electric wheelchairs with 200 x 50 (8x2) casters tires with 5/16" installed bearings.Tire Size: 8"x2" (200x50)Total width from bearing to bearing is approx. 2 3/8" Solid caster tires with rims and 5/16" 8mm bearings.Bearing: 608ZZMaterial: EVA Thanks for looking!!