First Shimano bottom bracket cups

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FIRST Shimano Bottom Bracket Cups | Smooth & Reliable Drivetrain Upgrade

Unlock the true potential of your drivetrain with the FIRST Shimano Bottom Bracket Cups, a premium component engineered for cyclists who demand reliability, smoothness, and exceptional performance. As the central pivot of your crankset, the bottom bracket is critical for efficient power transfer. These cups from FIRST are designed to be a significant upgrade over standard components, providing a noticeable improvement in pedaling feel and durability for your Road Cycling adventures and beyond. Whether you are building a new bike from the frame up or breathing new life into your trusted machine, this bottom bracket is the foundation for a superior ride.

Experience Effortless Power Transfer and Silky-Smooth Pedaling

The core benefit of the FIRST bottom bracket lies in its precision-engineered bearings and robust construction. Feel the difference as friction is minimized, allowing every watt of your energy to be transferred directly to the wheels. This results in a more responsive and efficient pedaling motion, reducing fatigue on long rides and giving you a competitive edge. The durable build ensures this smooth performance is maintained over thousands of miles, resisting the elements and the rigors of intense cycling, so you can spend more time riding and less time on maintenance.

Versatile Compatibility for Modern Drivetrains

One of the standout features of this bottom bracket is its exceptional versatility. While designed to be a perfect match for Shimano Hollowtech II cranksets with a 24mm spindle, it also includes the necessary adaptability for TRUVATIV GXP systems. Thanks to the intelligent internal bearing design (Ø 22x24 mm), it seamlessly accommodates the stepped spindle of GXP cranksets, making it a highly flexible solution for a wide range of setups. Furthermore, its ability to fit both 68 mm (standard for Road Cycling) and 73 mm bottom bracket shells makes it a one-stop solution for multiple bikes in your collection.

The construction features a high-strength Nylon TPT body, which provides excellent durability and resistance to corrosion while keeping weight to a minimum. This is paired with precision-machined alloy adapters that ensure a secure and creak-free fit into your bike´s frame. The standard English threading (BC 1.37 - 24TR/L) guarantees straightforward installation on the vast majority of modern and classic frames. Each unit is delivered in an official FIRST display box, assuring authenticity and quality.

Upgrade your bike´s core with the FIRST Shimano Bottom Bracket Cups and transform your ride with enhanced efficiency, lasting durability, and unparalleled smoothness.

Specifications:

* Primary Compatibility: Shimano Hollowtech II (24mm spindle)
* Adapter Compatibility: TRUVATIV GXP (with integrated 22mm x 24mm internal bearings)
* Frame Shell Width: Adaptable for 68 mm and 73 mm
* Body: High-strength Nylon TPT
* Adapters: Precision Alloy
* Threading: BC 1.37" x 24 TPI Left/Right
* Discipline: Road Cycling, Mountain Biking, Gravel