Bottom Brackets
This is our BSA / English Threaded M30 bottom bracket for installing a Praxis M30 Spindle based crank into a BSA English threaded frame.
68mm Road / 68/73mm MTN / 83mm DH
Threaded BB for BB86, BB92 and PF90 frames and 24mm diameter spindle cranks. Machined cups thread together for stability, increased bearing life, and simple installation and maintenance.
MegaExo bottom bracket for NBD MTB MegaExo cranksets. Ceramic bearings for minimum friction and maximum durability.
This is our M30-THRU BB for installing our Doon & Lyft into BSA THREADED frames.
30mm DRIVE / 30mm Non-DRIVE
Adapts 24mm spindle cranks (Shimano, FSA, etc.) to most BBRight™ frames. Also adapts Cannondale BB30a and PF30a frames to 24mm spindle cranks (Shimano, FSA, etc.).
Fit Kit not included
T47 threaded BB cups for T47 frames and 30mm diameter spindle cranks. Cups have internal bearings, and can be used in BB shells with widths from 68mm to 132mm. Machined aluminum cups thread together directly into a T47 BB shell
T47 threaded BB cups for T47 frames and 24.00mm spindle diameter cranks. Cups have internal bearings, and are typically used in BB shells with widths wider than 73mm. Machined aluminum cups thread together directly into a T47 BB shell.
T47 threaded BB cups for T47 frames and 29mm diameter spindle SRAM DUB compatible cranks. Cups have internal bearings, and can be used in BB shells with widths from 86mm to 121mm. Machined aluminum cups thread together directly into a T47 BB shell.
External English (BSA) threaded bottom bracket for 73mm shells. We use only Enduro bearings and silicone seals for the most durable and smoothest bottom brackets available. Fully serviceable.
Expand your choice of cranks for use in frames with 41mm ID shells. Replace your bottom bracket with these dual-row flanged bearings and run 30mm spindle cranks in your frame. These bearings fit directly in frames with 41mm ID bottom bracket shells.
Our BB86/92 bottom bracket is a significant upgrade to any OEM BB86/92 bottom bracket. Our BB86/92 bottom bracket is a significant upgrade to any OEM BB86/92 bottom bracket.
The bike bottom bracket is the hub where your seat tube, frame tube, and a chainstay all come together to create your drivetrain. Inside the bottom bracket, you will find a spindle bracket that connects to the crankset and bearings, causing the crankset to rotate efficiently. These components fit many bike designs and primarily come in a threaded, press-fit, or square taper design. When the rider pedals, energy is produced and propels the bike forward. The bearings inside provide a smooth ride with little resistance and minimal effort.
Our bike bottom brackets and spindle brackets work with all existing bracket designs from all leading manufacturers. They work well with the BB30, BB86, BB90, BB92, BB95, OSBB, and BB386EVO, to name a few.
When To Replace Bike Bottom Brackets & Spindle Brackets
If you hear strange noises coming from your brackets, that could be signaling that there is a lot of play in your bearings. The bearings inside may need repair if you're experiencing side-to-side movement with the crank arm. If you feel movement in the crank arm, this could mean that you need to perform repairs. If you have play in your bottom bracket, it can cause your crankset to move and drop your chain while you're riding. Also, if you experience any wobble or play in your ride, it could mean that your bracket contains dirt or water. Debris will make it harder for you to pedal.
Why Choose Bottom Brackets from Big & Tall Bikes?
You can use our bottom bracket adapter kits to install a standard bearing into your PF30 or BB30 frame. With Zinn, you can feel confident that you will have no installation issues and eliminate any future headaches. All you need to do is browse this page, select the right part for your particular bike, and leave the shipping to us. If you have any additional questions, feel free to schedule a call or email us at [email protected].
