MR22378-LLB-E Enduro Bike Bearing Extended Inner 22x37x8/11.5 Applications - SRAM Crank, Non Drive Side. Enduro Abec 3 Specification: Rubber seals - usually blue LLB is a double-lip type seal making light contact and also rides in a groove making a labyrinth seal. LLU is a double- lip type seal making medium contact and also rides in a groove making a labyrinth seal. Grade 10 Chromium Steel Balls: High precision balls are within 10/1,000,000″ round, twice as round as the industry standard, at it’s highest level. 52100 High Carbon Chromium Alloy Races: Vacuum de-gassed process for the purest chromium alloy steel, hardened to R-62, extremely tough and very durable. Polished to a mirror finish for ABEC-3 precision and noiseless movement. Riveted Steel Retainer for toughness, ABEC-3 tolerances and noise tested, C-3 or C-N Internal Clearance