BKC-54103 - XD15 Ceramic-Hybrid, ABEC-5, Bottom Bracket Bearing Kit for Shimano 24mm x 37mm External Cup BBs TH-873 500 AF Delrin pulley material

500 AF Delrin pulley material features a high mechanical tensile strength and rigidity

we press XD15 45 Angular Contact bearings into precision machined aluminum threaded aluminum cups that simply thread directly into the BB shell

and spacers needed for proper chain line adjustment

labyrinth (LLB) seals and 90% fill with Mobil XHP 222 high pressure water proof grease to withstand daily abuse of use and the elements

MR 17287 LLU/LLB C3 - ABEC-5

BKC-54103 - XD15 Ceramic-Hybrid, ABEC-5, Bottom Bracket Bearing Kit for Shimano 24mm x 37mm External Cup BBs TH-873 500 AF Delrin pulley materialBKC 54103 XD15 Ceramic Hybrid, ABEC 5, Bottom Bracket Bearing Kit for Shimano 24mm x 37mm External Cup BBs Enduro's top of the line BB bearing kit, we couple our XD15 Ceramic Hybrid, ABEC 5 bearings along with all of the necessary seals and spacers to complete a precise, professional installation. An Enduro Bearings exclusive, our XD15 Ceramic Hybrid bearings combine corrosion proof, cryogenically treated nitrogen steel races with Silicon Nitride