TOKEN TK878 BSA Threaded External Bottom Bracket for Shimano

$75.90 AUD

Taxes included. Shipping calculated at checkout.

The TOKEN TK878 BSA Threaded External Bottom Bracket for Shimano is a premium‑quality drivetrain component engineered for riders who demand durability, smooth bearing performance, and long service life. Designed for BSA threaded frames and Shimano 24 mm cranksets, this bottom bracket is widely stocked by Brisbane bike shops and installed during professional bicycle service and drivetrain upgrades across Queensland.

Built to perform in demanding riding conditions, the TK878 is equally at home on road bikes, endurance builds, gravel bikes, and mountain bikes serviced by professional cycling mechanics.

External Bearing Design for Strength and Longevity

The TOKEN TK878 features an external bottom bracket design, allowing the use of oversized bearings for increased load capacity and durability. The bearings are positioned to rest directly on the crank axle, ensuring straight load transfer through the system. This design reduces bearing stress, improves efficiency, and significantly extends bearing life compared to traditional designs.

The result is smoother pedalling, reduced friction, and consistent drivetrain performance — even under high torque and long‑distance riding.

Precision Machining for Smooth Performance

Manufactured with tight tolerances, the TK878 bottom bracket delivers excellent alignment between frame, bearings, and crankset. This precision reduces drag and vibration, supporting efficient power transfer and reliable performance for riders training and racing throughout Brisbane and South East Queensland.

The refined finish also makes the TK878 a visually appealing upgrade for high‑quality bike builds.

Premium or Ceramic Bearings for All‑Conditions Riding

The TK878 is available with Premium high‑carbon steel bearings for maximum durability or TBT ceramic bearings for riders seeking reduced rolling resistance and peak drivetrain efficiency. Both bearing options are precision manufactured and packed with waterproof grease to withstand wet weather, frequent cleaning, and high‑kilometre use.

X‑Seal Technology for Low Maintenance Reliability

TOKEN’s patented X‑Seal system uses multiple precision seals to protect bearings from moisture, dirt, and trail debris. These seals minimise friction while providing superior contamination resistance — a key advantage for riders who train year‑round or ride in harsh conditions.

This advanced sealing system helps reduce maintenance requirements and extends service intervals between scheduled bicycle servicing.

Suitable for Road, Gravel, and Mountain Bike Use

With oversized bearings and a robust external design, the TK878 is strong enough for mountain bike applications, while still offering the smoothness and efficiency demanded by road and endurance riders. This versatility makes it a trusted choice for cyclists seeking a durable bottom bracket solution installed by Brisbane bicycle service professionals.