Steel BSA Bottom Brackets

Steel BSA bottom brackets provide an economical and durable solution, perfect for bikes equipped with a BSA threaded bottom bracket. The BSA, also known as "British Standard Thread", is a widely used standard in cycling, with a threading of 1.37 x 24 TPI (threads per inch). This standard ensures broad compatibility and easy installation, especially on road and mountain bikes with a BSA bottom bracket.

While steel BSA bottom brackets are ideal for budget bikes, they are also found on high-end models such as the Specialized SL7, SL8, and Aethos. For these high-performance bikes, we recommend a ceramic BSA model to enhance smoothness and efficiency.

Compatibility of Steel BSA Bottom Brackets

In our steel BSA bottom bracket range, you’ll find options compatible with several popular crank types:

• Shimano and Rotor 24 mm Cranks: Compatible with all generations, providing easy installation for Shimano and Rotor users.
• Rotor 30 mm Cranks: Ideal for Rotor enthusiasts, offering optimal compatibility with 30 mm axles.
• SRAM DUB Cranks: A great choice for DUB users, known for their lightweight and durable build.

Guide: How to Tell If Your Bike Has a BSA Bottom Bracket

Here’s a quick guide to determine if your bike uses a BSA bottom bracket:

1. Check the Threads: The BSA bottom bracket uses a 1.37 x 24 TPI thread. If you see threads with this specification, it’s likely a BSA model.
2. Measure the Width: BSA bottom brackets are usually 68 mm wide for road bikes and 73 mm for mountain bikes. Use calipers to confirm the width.
3. Check the Bike’s Specifications: Refer to the manufacturer’s specifications or user manual, which often indicate the type of bottom bracket.
4. Consult a Professional: If in doubt, a bike mechanic can quickly identify the bottom bracket type.

Steel BSA bottom brackets, with their standard 1.37 x 24 TPI threading, offer a solid and affordable choice. Whether you’re using Shimano, Rotor, or SRAM DUB cranks, our range of steel BSA bottom brackets provides durability and compatibility for reliable and efficient pedaling.