Shimano Bottom Bracket BB-MT801 – HOLLOWTECH II for precise power transfer
The Shimano BB-MT801 bottom bracket features HOLLOWTECH II technology and is designed for mountain bikes and trekking bikes. It has a BSA thread and fits shell widths of 68 and 73 mm.
HOLLOWTECH II axle with 24 mm diameter provides high stiffness and optimal power transfer.
Fits BSA bottom bracket shells with 68 mm or 73 mm width – versatile use.
Lightweight design at only 130 g reduces overall bike weight.
24 months manufacturer's warranty ensures long-term peace of mind for your bike.
What sets the Shimano BB-MT801 bottom bracket apart
Compared to standard bottom brackets, HOLLOWTECH II technology delivers improved stiffness at a lower weight. The precision bearings run smoothly and increase drivetrain efficiency. Installation is straightforward with common tools.
Ideal for...
This bottom bracket is aimed at mountain bikers and trekking cyclists looking for a reliable and durable component for their bike. Suitable for daily commuting as well as leisure riding.
How to install the Shimano BB-MT801 bottom bracket
Installation requires a BSA thread tool and a torque wrench. Remove the old bottom bracket, clean the shell, insert the new bracket, and tighten to 35–50 Nm. Ensure correct alignment of the crank arms.
Shimano is a Japanese manufacturer of bicycle components and fishing tackle, founded in 1921 in Osaka. The company is globally known for high-quality derailleurs, brakes, and drivetrain components. Shimano is one of the leading brands in cycling and is valued by professionals and hobbyists alike.
The BB-MT801 is a bottom bracket with HOLLOWTECH II design for bicycles with BSA threads. It serves as the bearing for the crank axle and enables low-friction power transfer.
The bottom bracket fits BSA shells with a width of 68 mm and 73 mm. It comes with appropriate spacer rings.
The bottom bracket is designed for all Shimano HOLLOWTECH II cranks, including the XT, SLX, Deore, and GRX series. Other cranks with a 24 mm axle may also be compatible if intended for BSA shells.
Installation requires a BSA bottom bracket tool (e.g., Shimano TL-FC25 or compatible) and a torque wrench. Recommended torque is 35–50 Nm.
Shimano provides a 24-month manufacturer's warranty on the BB-MT801 bottom bracket. The warranty covers material and workmanship defects under normal use conditions.
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