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Shimano XT BB-MT800 Bottom Bracket
$24.99
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MSRP $33.99
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SRAM Dub English Threaded Bottom Bracket
$32.80
SAVE 20 %
MSRP $41.00
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Cane Creek Hellbender 70 Bottom Bracket
From $115.99
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MSRP $124.99
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SRAM Dub Pressfit 89/92 Bottom Bracket
$42.98
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SRAM / Truvativ Team GXP Bottom Bracket
$26.65
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Wheels Manufacturing BSA MTB 73mm Bottom Bracket
From $72.99
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MSRP $93.00
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Wheels Manufacturing PF30 to Shimano BB
$83.98
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MSRP $110.00
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Shimano Ultegra BB72-41B Bottom Bracket
$27.99
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Shimano Bbr60 Ultegra Bottom Bracket
$17.99
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Wheels Manufacturing SRAM DUB Bottom Brackets
From $31.99
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Wheels Manufacturing BB30 to Shimano BB
$83.55
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SRAM DUB T47 Ceramic Bottom Bracket
$229.00
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Shimano BB-MT800 Pressfit Bottom Bracket
$24.99
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Rotor BB Press Fit 4624 RD Steel
$76.94
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Wheels Manufacturing PF30 to SRAM GXP BB
From $73.99
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SRAM DUB Road Wide Bottom Brackets
From $35.00
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Wheels Manufacturing PF30 to BB30 BB
$54.54
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SRAM DUB PF BB386 Road Bottom Bracket
$45.00
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SRAM/Truvativ GXP BB92 Bottom Bracket
$22.94
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MSRP $46.00
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SRAM/Truvativ GXP BB86 Bottom Bracket
$35.00
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Shimano Dura-Ace BB-R9100 Bottom Bracket
From $31.00
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Wheels Manufacturing BB30 Adaptor Set
$39.36
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Wheels Manufacturing Bbright
$87.68
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SRAM DUB PF 86.5 Road Bottom Bracket
$39.00
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PAGE 1 of 3
 

Bottom Brackets

Tucked into the bottom section of your frameset, right where the seat tube, down tube and chainstays meet between your spinning cranks, is the bottom bracket, a vital component that connects the crankset to the frame. Consisting of bearings and a spindle (which is often integrated with the crankset), it fits into a small frame tube called the bottom bracket shell and allows your cranks to spin.

There are many different types of bottom bracket standards, with various interfaces and spindles, but regardless of which style you choose, some of the key performance factors to consider are durability, stiffness and weight. Quality bearings help minimize drag, so your cranks can turn easily with minimal resistance.

You might not think about the bottom bracket often, but it’s a component that can wear out over time. You will know it’s time for service, or perhaps a replacement, if you feel any play or resistance when spinning the cranks, or hear creaking noises while pedaling. When you are shopping for a new bottom bracket, the first thing you need to consider is compatibility. If you are building up a new bike, you will need to know if the frame has a threaded or press-fit bottom bracket shell, and also the width of the shell. If you are replacing a current bottom bracket, you also need to consider the spindle and crank interface.

If your BB shell is threaded, you will most likely be looking for a conventional threaded bottom bracket with external bearings. This design allows for wider spindles and increased stiffness. Older model road and mountain bikes have square taper spindles, but the more common standard among performance bikes today is a splined interface with the crank. Most modern cranksets have the BB spindle integrated into the driveside crankarm. Shimano calls this design Hollowtech II, and other brands have their own names for it. RaceFace X-type and FAS MegaExo are two common examples.

If your bike is designed for a press fit bottom bracket, you have a number of sizes and standards to choose from. These include BB90/BB95 used in Trek road and mountain bikes; PF86/92 used by Giant, Scott, Pivot and many others for road and mountain bikes; and the BB30 standard popularized by Cannondale. The numbers refer to the width of the BB shell, and typically mountain bikes are wider.

JensonUSA carries all these options, with a wide variety of product choices from top brands such as Shimano, SRAM, Chris King, FSA and Race Face. If you have any questions about bottom brackets, call one of our expert Gear Advisors today at 951-234-7554. They’ll be happy to help you find the perfect part.