The bearing cup outer diameter (OD) and the frame's BB shell inner diameter (ID) measure 46mm

Chainring: Included 32T Steel narrow-wide profile chainring with 76mm BCD bolt pattern

Pros: Affordable and works well

Body Material: Cast stainless steel

Bench Mounted Vice

Microshift R9 SB-R492 2x9 Speed Pair Drop Bar Shifter - 2x9 Speed - Drop Bar - Shimano Road Do Not Ship Internationally The bearing cup outer diameterR Series drop bar shifters are designed to make life easier. Upshifts and downshifts are handled by separate, discrete levers and the brake lever is completely fixed, meaning accidental shifts are a thing of the past. External shifter cable routing is easy to replace and avoids kinks in the housing. Add in comfy ergonomics and crisp shifting action, and you've got the best value in road shifters. Available in a number of combinations. Pick from the