BK-54101 - ABEC-3 Bottom Bracket Bearing Kit for Shimano 24mm x 37mm External Cup BBs 428420 The eleven-tooth upper and thirteen-tooth

The eleven-tooth upper and thirteen-tooth lower size and profile with 5mm bolt-holes are designed as an upgrade for most 11-speed Shimano GRX derailleurs

they require a light preload to guarantee the best adjustment

BRT-040 - Toolkit for BB bearing removal and installation

A radial bearing used by Wolf Tooth for their WolfCage offset Jockey Wheel

2mm x 25mm x 6

BK-54101 - ABEC-3 Bottom Bracket Bearing Kit for Shimano 24mm x 37mm External Cup BBs 428420 The eleven-tooth upper and thirteen-toothBK 54101 ABEC 3 Bottom Bracket Bearing Kit for Shimano 24mm x 37mm External Cup BBs Enduro's entry level BB bearing kit, though many steps up when compared to other products on the market, we couple our ABEC 3 radial bearings along with all of the necessary seals and spacers to complete a precise, professional installation. Engineered specifically for bicycle use, Enduro ABEC 3 bearings feature 52100 High Carbon Chromium alloy races paired with grade