Enduro Bearings MR 18307 LLB - ABEC 3 (Radial) - 18x30x7

ABEC 3: A standard value used to measure the w tolerance of the surface of the roller bearings. There are five classes: 1, 3, 5, 7 and 9. The higher the ABEC class the greater the precision, efficiency and speed capability, but the highest ABEC classes are not necessarily the fastest rotating parts. All quality manufacturers around the world use at least ABEC 1 as standard. At Enduro the minimum standard is ABEC 3. ABEC 3: Steel balls Grade 10. Track in an alloy of chrome 52100 and high-quality carbon. ABEC 3 standard. Depending on their application, these bearings use LLU or LLB seals; even when marked with 2RS. LLB: Our most popular seal, consisting of a rubber finish with a metal core. Unlike the standard 2RS, we go a little further by machining a notch in the inner ring, where the seal can rotate with excellent efficiency and resistance compared to a lesser bearing. Rather than a single «lip» of a thick seal that rubs against an uneven surface, the LLB type uses 2 lips of seals, fine like a razor blade that slides in a notch with a light contact. The outer «lip» keeps out water and impurities, while the inner seal retains grease for smooth rotation and long intervals between services.

Item number MR18307LLB EAN 810191013693 Brands Enduro Type ABEC 3 Bearing inner diameter (mm) 18 Bearing outer diameter (mm) 30 Bearing height (mm) 7 MR 18307 LLB - ABEC-5 Radial Bearing (C3 Clearance) - 18mm x 30mm x 7mm This high-quality ABEC-5 radial bearing features deep-groove races with Grade 10 balls, for smooth operation and durability. Featuring dual-lip labyrinth (LLB) seals and filled with high-pressure waterproof grease, designed to withstand everyday stress and rough conditions. Ideal as a hub bearing, bottom bracket bearing for older square axle cranksets, or as a pivot bearing—although the MAX variant is better suited for suspension. Often used as a replacement for 6903 brands in front wheel hubs from DT Swiss, Giant and Bontrager, among others, with a slightly larger inner diameter of 1mm. Part of the Enduro line, available in high-carbon chrome steel, 440C stainless steel, ceramic-hybrid and XD-15 with ceramic or stainless steel balls. Designed with deep-groove races to accommodate larger bullets and feature dual-lip seals that ride in a micro-groove, creating a complete labyrinth for long life and superior protection from the elements. Static load___ 576 lbf / 2.56 kN | Weight: 15.1g