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

ABEC 3: A standard value used to measure the tolerance of the surface of rolling bearings. There are five classes: 1, 3, 5, 7, and 9. The higher the ABEC class, the greater the precision, efficiency, and speed capacity, but the highest ABEC classes are not necessarily the fastest rotating components. All quality manufacturers worldwide use at least ABEC 1 as standard. At Enduro, the minimum standard is ABEC 3. ABEC 3: Steel balls Grade 10. Raceway in a 52100 chrome alloy and high-carbon steel. ABEC 3 standard. Depending on their application, these bearings use LLU or LLB seals; even when marked 2RS. LLB: Our most popular seal, consisting of a rubber finish with a metal core. Unlike the standard 2RS, we go a step further by machining a recess 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 rubbing against an uneven surface, the LLB type uses 2 lips of seals, razor-thin, that slide into a recess with light contact. The outer "lip" keeps water and impurities out, while the inner seal retains the grease for smooth rotation and long intervals between maintenance.

Article number MR18307LLB EAN 810191013693 Brands Enduro Bearing height (mm) 7 Inner diameter bearing (mm) 18 Outer diameter bearing (mm) 30 Type ABEC 3 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. Equipped with dual-lip labyrinth (LLB) seals and filled with high-pressure waterproof grease, designed to withstand daily loads and harsh conditions. Ideal as a hub bearing, bottom bracket bearing for older square taper cranksets, or as a pivot bearing—although the MAX variant is better suited for suspension. Often used as a replacement for 6903 bearings 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 balls and equipped with dual-lip seals that ride in a micro-groove, creating a complete labyrinth for long life and superior protection against the elements. Static load___ 576 lbf / 2.56 kN | Weight: 15.1 g