ENDURO BEARINGS Mr 18307 llu/llb cn a5 - abec 5 (radial) - 18x30x7

Experience reliable performance with this high-quality ABEC-5 radial bearing, featuring deep-groove race design and Grade 10 balls for enhanced durability. Equipped with dual-lip, labyrinth, full-contact LLU seals facing outward to resist daily wear and environmental elements, and lighter-contact LLB seals inward to contain high-pressure, waterproof synthetic grease (Mobil XHP 222). The CN clearance specification suits looser press-fit bearing housings. Commonly used as a hub bearing, bottom bracket bearing for older square taper setups, or as a pivot bearing—though MAX-type versions are preferred for suspension applications. Often replacing 6903 bearings in front hubs from brands like DT Swiss, Giant, and Bontrager, with a 1mm larger inner diameter. Available in high-carbon chromium steel, 440C stainless steel, ceramic-hybrid, and XD-15 with ceramic or stainless steel balls. Engineered with deep-groove races to accommodate larger balls and dual-lip seals creating a full labyrinth for superior protection against dirt and moisture. Static load capacity: 438 lbf / 1.94 kN. Weight: 15.1 g.