Rotor Track BSA Bottom Bracket (Steel)

The Rotor Track BSA Bottom Bracket (Steel) is designed for track cyclists who demand maximum stiffness, reliability, and efficient power transfer. Built to handle the intense demands of track riding, this bottom bracket ensures every watt of energy is delivered directly to the drivetrain for fast acceleration and responsive performance. Featuring high-quality steel bearings and a precision-engineered design, it provides smooth rotation and long-lasting durability. The 100% CNC-machined 7075 aluminum construction offers an excellent balance of strength and lightweight performance, while advanced labyrinth seals help protect the bearings from dirt and contamination. Designed specifically for BSA threaded frames with a 68mm shell width, this bottom bracket is an ideal choice for riders looking for dependable compatibility, low maintenance, and race-ready performance on the velodrome or urban track bike setup.

Key Features

• High Stiffness: Designed to maximize power transfer for track cycling performance

• Steel Bearings: Smooth operation with excellent durability and reliability

• CNC-Machined Construction: Precision-made from premium 7075 aluminum

• Labyrinth Seals: Help prevent dirt, dust, and moisture from contaminating bearings

• Track-Specific Design: Engineered for the demands of track racing and fixed-gear riding

• BSA Threaded Compatibility: Fits standard BSA threaded track frames

• Lightweight Build: Optimized strength with minimal weight penalty

• ROTOR Crankset Compatible: Designed for seamless integration with ROTOR cranksets

Product Specifications

• Product Type: Bottom Bracket

• Brand: ROTOR

• Discipline: Track

• Frame Type: BSA

• Shell Width: 68mm

• Weight: 119g

• Material: 100% CNC-machined 7075 Aluminum

• Bearing Material: Steel

• Axle Diameter Compatible: 24mm

• Compatible Crankset Brand: ROTOR

• Seal Type: Labyrinth Seals

Bearing Protection & Durability

The Rotor Track BSA Bottom Bracket is equipped with advanced labyrinth seals that provide effective protection against dirt, dust, and moisture. This sealing system helps extend bearing life while maintaining smooth performance over time. Combined with durable steel bearings and precision machining, the bottom bracket is built to withstand the demanding conditions of competitive track cycling and daily fixed-gear use.

Easy Operation / Usage

• Install into a compatible BSA threaded frame with a 68mm shell width

• Pair with a compatible ROTOR crankset and 24mm axle spindle

• Ensure proper torque settings during installation for optimal performance

• Periodically inspect and clean the external areas to maintain bearing longevity

• Suitable for velodrome racing, track training, and fixed-gear riding setups

Why Choose This Product

• Delivers efficient power transfer for track cycling performance

• Durable steel bearings provide long service life

• Lightweight CNC-machined aluminum construction

• Reliable protection against bearing contamination

• Optimized for BSA threaded track frames

• Trusted ROTOR engineering and manufacturing quality

• Excellent choice for competitive and performance-focused riders

In the Box

• Rotor Track BSA Bottom Bracket (Steel)