Shimano XTR BB93 Hollowtech II English Bottom Bracket
What Is the Shimano XTR BB93 Bottom Bracket and What Does It Fit?
The BB93 is Shimano's XTR-tier threaded bottom bracket for English/BSA-threaded frames, designed to accept Hollowtech II external bearing cranksets across the XTR, XT, SLX, and Deore MTB lineups. The Hollowtech II system routes the crank axle through the bottom bracket shell rather than integrating the axle with the bearing cup, allowing Shimano to use larger diameter axle tubes for greater stiffness and to position the bearing outboard of the frame shell for better load distribution. The BB93 uses two sealed cartridge bearing cups that thread into standard English/BSA frames (68mm or 73mm shell width) and accept the 24mm Hollowtech II crank spindle with a smooth, self-centering fit. Shimano grades the XTR BB93 as a race-spec unit, with tighter bearing tolerances, lower rotational resistance, and more robust sealing against contamination ingress than lower-tier Hollowtech II bottom brackets. The result is a quieter, more responsive pedaling feel and longer service life in demanding trail and XC race use.
The BB93 is compatible with all Shimano Hollowtech II cranksets using a 24mm spindle, covering the current XT, XTR, SLX, and Deore MTB crankset generations. It requires a standard English/BSA threaded bottom bracket shell (68mm road or 73mm MTB shell width) and installs with a splined bottom bracket tool. For XC racers, endurance riders, and trail riders who want the highest-grade Shimano threaded bottom bracket available for their Hollowtech II crank, the BB93 is the correct XTR-spec choice.
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Shimano XTR BB93 Hollowtech II English Bottom Bracket
Shimano XTR BB93 Hollowtech II English Bottom Bracket
What Is the Shimano XTR BB93 Bottom Bracket and What Does It Fit?
The BB93 is Shimano's XTR-tier threaded bottom bracket for English/BSA-threaded frames, designed to accept Hollowtech II external bearing cranksets across the XTR, XT, SLX, and Deore MTB lineups. The Hollowtech II system routes the crank axle through the bottom bracket shell rather than integrating the axle with the bearing cup, allowing Shimano to use larger diameter axle tubes for greater stiffness and to position the bearing outboard of the frame shell for better load distribution. The BB93 uses two sealed cartridge bearing cups that thread into standard English/BSA frames (68mm or 73mm shell width) and accept the 24mm Hollowtech II crank spindle with a smooth, self-centering fit. Shimano grades the XTR BB93 as a race-spec unit, with tighter bearing tolerances, lower rotational resistance, and more robust sealing against contamination ingress than lower-tier Hollowtech II bottom brackets. The result is a quieter, more responsive pedaling feel and longer service life in demanding trail and XC race use.
The BB93 is compatible with all Shimano Hollowtech II cranksets using a 24mm spindle, covering the current XT, XTR, SLX, and Deore MTB crankset generations. It requires a standard English/BSA threaded bottom bracket shell (68mm road or 73mm MTB shell width) and installs with a splined bottom bracket tool. For XC racers, endurance riders, and trail riders who want the highest-grade Shimano threaded bottom bracket available for their Hollowtech II crank, the BB93 is the correct XTR-spec choice.
Original: $46.99
-70%$46.99
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Description
What Is the Shimano XTR BB93 Bottom Bracket and What Does It Fit?
The BB93 is Shimano's XTR-tier threaded bottom bracket for English/BSA-threaded frames, designed to accept Hollowtech II external bearing cranksets across the XTR, XT, SLX, and Deore MTB lineups. The Hollowtech II system routes the crank axle through the bottom bracket shell rather than integrating the axle with the bearing cup, allowing Shimano to use larger diameter axle tubes for greater stiffness and to position the bearing outboard of the frame shell for better load distribution. The BB93 uses two sealed cartridge bearing cups that thread into standard English/BSA frames (68mm or 73mm shell width) and accept the 24mm Hollowtech II crank spindle with a smooth, self-centering fit. Shimano grades the XTR BB93 as a race-spec unit, with tighter bearing tolerances, lower rotational resistance, and more robust sealing against contamination ingress than lower-tier Hollowtech II bottom brackets. The result is a quieter, more responsive pedaling feel and longer service life in demanding trail and XC race use.
The BB93 is compatible with all Shimano Hollowtech II cranksets using a 24mm spindle, covering the current XT, XTR, SLX, and Deore MTB crankset generations. It requires a standard English/BSA threaded bottom bracket shell (68mm road or 73mm MTB shell width) and installs with a splined bottom bracket tool. For XC racers, endurance riders, and trail riders who want the highest-grade Shimano threaded bottom bracket available for their Hollowtech II crank, the BB93 is the correct XTR-spec choice.
