Shimano Dura-Ace R9100 Hollowtech II - English Bottom Bracket
Why Is the Shimano Dura-Ace R9100 English Bottom Bracket the Right Choice?
The Dura-Ace R9100 Hollowtech II English bottom bracket is the threaded BSA standard version of Shimano's flagship road BB, designed for frames with an English threaded shell (68mm wide, 1.37 x 24tpi). It uses the same Hollowtech II outboard bearing design as all current Dura-Ace and Ultegra road bottom brackets, positioning the sealed cartridge bearings outside the frame shell for improved load distribution and a stiffer interface between crankset and frame. The outboard design also makes bearing replacement significantly easier than traditional cup-and-cone setups, as the bearing cups thread out with a standard bottom bracket tool.
Small ball bearings reduce rotational friction to keep pedaling feel light and efficient over long miles, and the seal construction protects the bearings from road contamination during wet or muddy rides. This BB is the correct choice for Dura-Ace R9100 and compatible Hollowtech II cranksets including Ultegra R8000 and 105 R7000 on any frame with a standard BSA English threaded shell. For frames that require Italian threading, the separate R9100 Italian version is the appropriate unit. If you are setting up a Dura-Ace-level drivetrain on a traditional threaded frame, this is the bottom bracket that completes the system.
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Shimano Dura-Ace R9100 Hollowtech II - English Bottom Bracket
Shimano Dura-Ace R9100 Hollowtech II - English Bottom Bracket
Why Is the Shimano Dura-Ace R9100 English Bottom Bracket the Right Choice?
The Dura-Ace R9100 Hollowtech II English bottom bracket is the threaded BSA standard version of Shimano's flagship road BB, designed for frames with an English threaded shell (68mm wide, 1.37 x 24tpi). It uses the same Hollowtech II outboard bearing design as all current Dura-Ace and Ultegra road bottom brackets, positioning the sealed cartridge bearings outside the frame shell for improved load distribution and a stiffer interface between crankset and frame. The outboard design also makes bearing replacement significantly easier than traditional cup-and-cone setups, as the bearing cups thread out with a standard bottom bracket tool.
Small ball bearings reduce rotational friction to keep pedaling feel light and efficient over long miles, and the seal construction protects the bearings from road contamination during wet or muddy rides. This BB is the correct choice for Dura-Ace R9100 and compatible Hollowtech II cranksets including Ultegra R8000 and 105 R7000 on any frame with a standard BSA English threaded shell. For frames that require Italian threading, the separate R9100 Italian version is the appropriate unit. If you are setting up a Dura-Ace-level drivetrain on a traditional threaded frame, this is the bottom bracket that completes the system.
Original: $46.99
-70%$46.99
$14.10Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Why Is the Shimano Dura-Ace R9100 English Bottom Bracket the Right Choice?
The Dura-Ace R9100 Hollowtech II English bottom bracket is the threaded BSA standard version of Shimano's flagship road BB, designed for frames with an English threaded shell (68mm wide, 1.37 x 24tpi). It uses the same Hollowtech II outboard bearing design as all current Dura-Ace and Ultegra road bottom brackets, positioning the sealed cartridge bearings outside the frame shell for improved load distribution and a stiffer interface between crankset and frame. The outboard design also makes bearing replacement significantly easier than traditional cup-and-cone setups, as the bearing cups thread out with a standard bottom bracket tool.
Small ball bearings reduce rotational friction to keep pedaling feel light and efficient over long miles, and the seal construction protects the bearings from road contamination during wet or muddy rides. This BB is the correct choice for Dura-Ace R9100 and compatible Hollowtech II cranksets including Ultegra R8000 and 105 R7000 on any frame with a standard BSA English threaded shell. For frames that require Italian threading, the separate R9100 Italian version is the appropriate unit. If you are setting up a Dura-Ace-level drivetrain on a traditional threaded frame, this is the bottom bracket that completes the system.
