Wheel bearing set. All Balls Racing wheel bearings feature high-speed bearings, precisely manufactured to ABEC 3 standards. They also have triple rubber seals that keep grease inside and prevent water and dirt from entering. The wheel bearings use Chevron SRI 2 grease, which contains rust and oxidation inhibitors (-29° C - 177° C). They include double TC-type seals with stainless steel springs. The sets complete one wheel.