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Ergonomically optimized: Lightweight hand protection while riding due to its anatomical pre-forming fit of the palm and fingers
Length from nose to 75mm width: 141mm
Pins:10 adjustable pins per side
48mm presta (Non-removable valve core)
Shimano Dura-Ace SM-BB92-41B Hollowtech II Press Fit Bottom Bracket Eligible Product Ergonomically optimized: Lightweight hand protectionWith an advanced seal construction for smoother rotation, the Dura Ace is still lightweight at 54 grams. Shimano precisely engineers their highest quality steel ball bearings for this unit and with the seal effectiveness improved, infiltration and corrosion are incredibly unlikely, even with regular bike cleanings during the rainy seasons or during cyclocross. Model no: SM BB92 41B Series: Dura Ace R9100 Weight: 54g Discipline: Road Press fit bottom