MR 17287LB - ABEC-5, Radial Bearing (C3 clearance) - 17mm x 28mm x 7mm -This ABEC-5 bearing features deep-groove design 52100 High-Carbon Chromium alloy races, with grade 10 balls, dual-lip labyrinth (LLB) seals to withstand the outside elements, and to contain the 90% fill Mobilux NGLI 2 high pressure water proof synthetic grease.A radial bearing generally used as a hub bearing, and can be used as a pivot bearing though the MAX-type version of this bearing is better suited for suspension use.The Enduro line of bearings are available in high-carbon chromium steel, 440C stainless steel, ceramic-hybrid and XD-15 with ceramic or stainless balls. Our bearings are always engineered with deepest groove races possible to accommodate the largest balls and feature dual-lip seals that ride in a micro-groove creating a full labyrinth to provide superior protection against the elements.Static load - 418lbf / 1.86kNWeight - 13.59g