B 541 SS - 1 440C Stainless, Angular Contact Headset Bearing 428420 The 15º Angular Contact design

The 15º Angular Contact design of these bearings requires a light preload to guarantee the best adjustment

BKCJ-0341 - 11 tooth

The T47A (Asymmetrical) specification is a new thread-in standard that has is similar in concept to BBRight (but with threads) that been used by a couple brands

Machined Delrin Derailleur Pulleys for 11 speed Shimano Derailleurs (5mm bolt hole)

B 541 SS - 1 440C Stainless, Angular Contact Headset Bearing 428420 The 15º Angular Contact designB 541 SS 1 Stainless Steel, Torque Tube Radial Design Headset bearing (1 1 16 x 1 1 2 x 9 32 inch) Radial bearing for internal Headsets featuring 440C stainless steel balls and races to provide maximum corrosion resistance. Torque Tube bearings feature inner races that are slightly wider than the outer race. Not all stainless steel is created equal. Enduro only uses 440C stainless steel balls and races to provide long life and superior corrosion