CO MR 27537 LLB - Enduro Zero, Black-Oxide, Ceramic Hybrid, ABEC-5, Radial Bearing (CN Clearance) - 27.5mm x 37mm x 7mm sale For bottom bracket installation:

For bottom bracket installation:

BBT-52x16-29 - Pro BB Cup Socket installation tool

3801 LLU MAX-7 - MAX-Design

while the lighter-contact (less seal-drag) LLB seals facing inward keep the lube where it belongs

Extended Race

CO MR 27537 LLB - Enduro Zero, Black-Oxide, Ceramic Hybrid, ABEC-5, Radial Bearing (CN Clearance) - 27.5mm x 37mm x 7mm sale For bottom bracket installation:CO MR 27537LB Enduro Zero, Black Oxide, Ceramic Hybrid, ABEC 5, radial Bearing (CN clearance) 27. 5mm x 37mm x 7mm Enduro Zero, Ceramic Hybrid, ABEC 5, radial bearing featuring black oxide treated 52100 high Carbon Chromium alloy races paired with Grade 5 Silicon Nitride Ceramic balls, with dual lip labyrinth (LLB) seals to withstand the outside elements and to contain the 90% fill Mobilux NGLI 2 high pressure water proof synthetic grease. Si3N4