ACB MRA 1728 Enduro Bottom Bracket Bearing 17mm x 28mm x 7mm Tags Basic Bearing Insert: UCX18-56

Basic Bearing Insert: UCX18-56

K 5 M6 Screw DIN 6912

Roller dia d1: 10

Basic Bearing Insert: UCX18

Width B: 67

ACB MRA 1728 Enduro Bottom Bracket Bearing 17mm x 28mm x 7mm Tags Basic Bearing Insert: UCX18-56ABEC 5 Radial Bearing featuring 52100 High Carbon Chromium alloy races paired with grade 5 Balls with 90% fill, high pressure, water proof grease. Designed specifically bicycle applications, the LLU LLB seal combination on these bearings utilizes a more protective LLU seal facing outward, towards the elements, to reduce contamination from water or dirt, while the lighter contact (less seal drag) LLB seals facing inward keep the grease where it