Enduro bearings 71903 llb a5 - abec 5 (angular contact) - 17x30x7

71903 LLB - ABEC-5 Angular Contact Ball Bearing (C3 clearance) - 17mm x 30mm x 7mm Improve your cycling performance with the high-quality 71903 LLB ABEC-5 angular contact bearing, designed for front wheel hubs, bottom brackets on older square taper bikes, and as a pivot bearing. While the MAX variant is better suited for suspension systems, this bearing offers exceptional durability and precision. Features include a deep-groove race design, Grade 10 balls, dual-lip labyrinth (LLB) seals for optimal protection against dirt and water, and a waterproof, high-pressure synthetic grease (Mobilux NGLI 2). When correctly installed (black seal facing inwards) and properly adjusted, Enduro angular contact bearings ensure maximum contact between the balls, distributing force evenly, reducing friction, limiting wear, and extending lifespan. Available in high-carbon chrome steel, 440C stainless steel, ceramic-hybrid, and XD-15 with ceramic or stainless steel balls, our bearings are designed with deep-groove races to accommodate larger balls and feature dual-lip seals in micro-grooves for superior protection against the elements. Static load rating: 573 lbf / 2.55 kN. Weight: 15.3 grams.