Shimano XTR SM-BB91-42A Hollowtech II Pressfit 42 X 84.5mm MTB Bottom Bracket BBShimano SM BB91 42A bottom bracket pressfit for Specialized OSBB Made in Japan The Shimano SM BB91 42A is a pressfit bottom bracket that allows a Shimano Hollowtech II crank to be fitted into a Specialized MTB frame with an OSBB aluminium bottom bracket. These have a special shell width of 84. 5 mm with 42 mm shell diameter. Thanks to its 24 mm bearing and axle diameter, the inner bearing convinces in terms of stability, weight and efficiency. Shimano

Weight:88grams(160mm)

Orange Ceramic

Anodized Colours

Range: round :30-38T / oval:32T-38T

Dimensions Chest Fit: 71 - 116cm

⚠️ Note 🌟 Brand new and original but no retail packaging

Mount: left + right

Winslow - 2013-2014

SRAM and Campagnolo compatible (Including all 10-speed MTB systems)

⚠ Black : 32T/34T

stopping the chain getting tangled or scratching your frame

Weight: 854g (approx)