Bushings fit arbor sizes 1″, 3/4″, 5/8″ and 1/2″. Come in 2 widths to fit the various thicknesses of Nova and Galaxy wheels.
For Galaxy Wheels: The two, four and six inch Galaxy wheels take 0ne 1″ bushing. The 7-5/8″ take two 3/4″ bushings.
For Nova Wheels: The two and four inch diameter Nova wheels take one 1″ bushing. The 6″ diameter Nova wheels take two 3/4″ bushing. The 7-5/8″ Nova wheels take two 1″ bushings.