BK-54101 - ABEC-3 Bottom Bracket Bearing Kit for Shimano 24mm x 37mm External Cup BBs 428420 Bearing Bottom Bracket for PF30

Bearing Bottom Bracket for PF30 Framesets to 30mm Cranksets (for older specification spindles under 90mm wide)

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

2mm x 25mm x 6

and contain the 90% fill Kluber NBU52 grease that runs smoother with time and is highly resistant to being washed out

Enduro bearings are available in a wide range of materials and performance levels

BK-54101 - ABEC-3 Bottom Bracket Bearing Kit for Shimano 24mm x 37mm External Cup BBs 428420 Bearing Bottom Bracket for PF30BK 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