Wheel bearing set for motorcycles and ATVs. All Balls Racing wheel bearings feature high-speed bearings, precisely manufactured to ABEC 3 level. They include triple rubber seals that keep grease inside and protect against water and dirt. They use Cheron SRI 2 grease, which contains rust and oxidation inhibitors, with an operating temperature from -29° C to 177° C. They have double TC type seals with stainless steel springs. This set will complete one wheel.