S6800 2RS - 440C Stainless Radial Bearing (CN Clearance) - 10mm x 19mm x 5mm 428420 Bottom Bracket bearing featuring 52100

Bottom Bracket bearing featuring 52100 High-Carbon Chromium alloy races paired with Grade 5 Balls with 90% fill

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

Weight - 50

The most common use for this bearing is as a an upper headset bearing for Pinarello Dogma

S6800 2RS - 440C Stainless Radial Bearing (CN Clearance) - 10mm x 19mm x 5mm 428420 Bottom Bracket bearing featuring 52100S6800 2RS Stainless Steel Radial Bearing (CN clearance) 10mm x 19mm x 5mm This radial bearing features 440C stainless steel alloy races and Grade 10 balls with dual seals and 90% fill with Mobil XHP 222 high pressure water proof grease to withstand daily abuse of use and the elements. A radial bearing generally used as a hub bearing for some quick release hub designs, pedals and can be used as a pivot bearing though the MAX type version of this