Enduro's ABEC 5 is the next performance step up from the popular ABEC 3 range. By using military level, high precision HRC-64 hardened Grade 5 Chromium Steel Balls, and 52100 High-Carbon Chromium-Alloy mirror polished races. This combination allows Enduro's ABEC 5 bearings to use tolerances twice as tight as ABEC 3, and operate without any noise. The Graphite/Nylon ball retainers allow virtually frictionless movement and provide constant lubrication to maximize the life of the bearing.
The letters after the bearing number designate the type of seals that are used in the bearing. “LLB” is a double-lip type seal making light contact, and also rides in a groove making a labyrinth seal. “2RS” literally means “Two Rubber Seals"