Shimano BB-MT501 English Bottom Bracket - 68/73mm
What Makes the Shimano BB-MT501 the Right Bottom Bracket for MTB?
The Shimano BB-MT501 is a Hollowtech II bottom bracket designed specifically for mountain bike use, compatible with 68mm and 73mm English thread bottom bracket shells. The Hollowtech II interface accepts Shimano's external bearing crankset system, which places the bearings outside the shell for a larger bearing diameter, better load distribution, and improved stiffness compared to traditional cartridge or cup-and-cone designs. Shimano upgraded the sealing in the BB-MT501 to keep water and trail contamination out of the bearings, directly improving durability and reducing service frequency on trail and all-weather builds.
The aluminum threaded cups save weight over steel equivalents while maintaining adequate thread strength for secure installation. Compatibility spans the Shimano MTB Hollowtech II crankset lineup including Deore, SLX, XT, and compatible mid-tier options. Installation requires a Shimano TL-BB13 or equivalent bottom bracket tool and follows standard English thread convention with left cup reverse-threaded. If you're running a Shimano two-piece crankset on a mountain bike, the BB-MT501 is the correct OEM-spec bottom bracket to run.
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Shimano BB-MT501 English Bottom Bracket - 68/73mm
Shimano BB-MT501 English Bottom Bracket - 68/73mm
What Makes the Shimano BB-MT501 the Right Bottom Bracket for MTB?
The Shimano BB-MT501 is a Hollowtech II bottom bracket designed specifically for mountain bike use, compatible with 68mm and 73mm English thread bottom bracket shells. The Hollowtech II interface accepts Shimano's external bearing crankset system, which places the bearings outside the shell for a larger bearing diameter, better load distribution, and improved stiffness compared to traditional cartridge or cup-and-cone designs. Shimano upgraded the sealing in the BB-MT501 to keep water and trail contamination out of the bearings, directly improving durability and reducing service frequency on trail and all-weather builds.
The aluminum threaded cups save weight over steel equivalents while maintaining adequate thread strength for secure installation. Compatibility spans the Shimano MTB Hollowtech II crankset lineup including Deore, SLX, XT, and compatible mid-tier options. Installation requires a Shimano TL-BB13 or equivalent bottom bracket tool and follows standard English thread convention with left cup reverse-threaded. If you're running a Shimano two-piece crankset on a mountain bike, the BB-MT501 is the correct OEM-spec bottom bracket to run.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
What Makes the Shimano BB-MT501 the Right Bottom Bracket for MTB?
The Shimano BB-MT501 is a Hollowtech II bottom bracket designed specifically for mountain bike use, compatible with 68mm and 73mm English thread bottom bracket shells. The Hollowtech II interface accepts Shimano's external bearing crankset system, which places the bearings outside the shell for a larger bearing diameter, better load distribution, and improved stiffness compared to traditional cartridge or cup-and-cone designs. Shimano upgraded the sealing in the BB-MT501 to keep water and trail contamination out of the bearings, directly improving durability and reducing service frequency on trail and all-weather builds.
The aluminum threaded cups save weight over steel equivalents while maintaining adequate thread strength for secure installation. Compatibility spans the Shimano MTB Hollowtech II crankset lineup including Deore, SLX, XT, and compatible mid-tier options. Installation requires a Shimano TL-BB13 or equivalent bottom bracket tool and follows standard English thread convention with left cup reverse-threaded. If you're running a Shimano two-piece crankset on a mountain bike, the BB-MT501 is the correct OEM-spec bottom bracket to run.
