Shop bicycle bottom brackets for smooth, efficient pedaling. Find threaded and press-fit bottom brackets for road, mountain, and gravel bikes.
 

Bicycle Bottom Brackets – Power Every Pedal Stroke

A bicycle bottom bracket is a crucial drivetrain component that connects your crankset to the frame, allowing for smooth pedaling and efficient power transfer. Whether you're upgrading for better performance, replacing a worn-out bottom bracket, or looking for the perfect fit for your bike, the right bottom bracket ensures durability, efficiency, and a seamless ride.

Types of Bottom Brackets

1. Threaded Bottom Brackets – Reliable & Easy to Maintain

Screws into the frame for secure and consistent performance.

Common on road, gravel, and mountain bikes.

Includes BSA (English Thread), Italian Thread, and T47 options.

2. Press-Fit Bottom Brackets – Lightweight & Stiff

Designed to press directly into the frame without threading.

Provides increased stiffness for better power transfer.

Found in BB30, PF30, BB86/92, and other variations.

3. External Bearing Bottom Brackets – High Durability

Bearings sit outside the frame for improved load distribution.

Common in Shimano Hollowtech II and SRAM GXP systems.

4. Ceramic Bottom Brackets – Enhanced Performance

Uses ceramic bearings for lower friction and improved efficiency.

Ideal for racing and high-performance road cycling.

Key Features to Consider

✔ Frame Compatibility – Ensure the bottom bracket fits your frame’s shell type.

✔ Crankset Compatibility – Match the spindle size and type to your crankset.

✔ Bearing Type – Choose from steel or ceramic bearings for performance and longevity.

✔ Durability & Sealing – Look for weather-resistant designs to prevent contamination.

✔ Weight & Stiffness – Lighter options enhance efficiency without sacrificing strength.

When to Replace Your Bottom Bracket

✔ Creaking or Clicking Sounds – A sign of worn bearings or improper fit.

✔ Rough or Loose Spinning Cranks – Indicates worn-out bearings.

✔ Excessive Play in the Crankset – Could mean the bottom bracket is failing.

✔ Water & Dirt Contamination – Over time, moisture and debris can degrade bearings.

Find the Best Bottom Bracket for Your Bike

From durable steel bearings for long-lasting performance to ceramic options for reduced friction, choosing the right bottom bracket keeps your ride smooth, efficient, and hassle-free. Shop now and keep your drivetrain performing at its best!