ACB 4545 150 SSM - 1-1/2 440C Stainless, Angular Contact Headset Bearing (40 x 51.8mm OD x 7-45/45) sale feature dual-lip seals riding in

feature dual-lip seals riding in a micro-groove (labyrinth) and areilled 90%ith high pressure water proof grease for the ultimate protection against sweat and the elements

00mm mount width

As expected it is also the most expensive of the 440 series alloys and requires multiple rounds of heat treatment and cryogenic treatment to achieve its superior mechanical properties

Bearing Bottom Bracket for BB30A Framesets and Shimano 24mm Cranksets

This eliminates mating parts that can created annoying noises like creaking

ACB 4545 150 SSM - 1-1/2 440C Stainless, Angular Contact Headset Bearing (40 x 51.8mm OD x 7-45/45) sale feature dual-lip seals riding inACB 4545 150 SSM 1 1 2 440C stainless steel Angular Contact Headset bearing (40mm x 51. 8mm x 7mm: 45x45 deg) Angular contact headset bearing featuring 440C stainless steel balls and races for superior corrosion protection. This size bearing overlaps the size of the ACB 4545 150 very closely, but features a slightly smaller (51. 8mm) OD to accommodate tighter lower bearing seats found in some framesets. This size bearing is also known in the bike