Tripeak Asymmetric Oversize Pulley Wheel - R81/R71

Jetstream Pro

Before AOPW,
the intricate process of upgrading to oversized pulley wheels
made it challenging for enthusiasts to dive in.
AOPW simplifies it all.
With just a common hex wrench,
you can effortlessly swap to the larger 18T AOPW.
No need to fuss with adjusting chain length＊
Install AOPW
hit the road
for an immediate experience
smooth & high speed!

18T tension pulley

The 18T tension pulley design results in smoother chain movement. Compared to the original 11T
derailleur pulleys,it reduces chain deflection angles and minimizes rotational resistance. Simultaneously adopting large-diameter bearings significantly enhances the smoothness and stability of the pedal performance.

Asymmetric Design

Developed by TRiPEAK, our patented asymmetric pulley frame design allows for an increase in tension pulley size to 18 teeth while seamlessly fitting into the original derailleur cage with minimal modifications, maximizing operational efficiency.

Hollow Frame

The hollow frame design of the pulley allows for a significant increase in bearing size, providing superior rotational performance and stable support for the 18T oversized pulley. The hollow fixed frame design substantially reduces the impact of any external object intrusion, ensuring consistent and reliable rotational performance at all times. Plus, it looks great!

Composite Injection Molding

Unlike traditional press-fit bearing pulleys, Tripeak's injection-molded pulley fully encases its bearing, ensuring a perfect zero-tolerance fit between pulley body and bearing. The composite material of the pulley body enhances its wear resistance, resulting in quieter and more efficient operation. Compared to traditional aluminum pulleys, it significantly extends the lifespan of both pulley and chain.

Narrow-Wide tooth

The Narrow-wide Tooth Design allows the pulley to better engage with the chain, significantly improving operational stability.

Jetstream Pro

Jetstream Pro Series stands for Rotation Optimized Ceramic Technologies. Because it takes more than just ceramic balls to minimize friction and gain watts. It´s about the composition of race, seal, lubricant and balls. Jetstream Pro Series delivers the right composition for the purpose. The JetStream Pro series offers exceptional efficiency and durability, backed by a reassuring four-year warranty for users.

G3 Ceramic Ball

G3-grade perfectly round ceramic balls create lower rotational resistance, allowing your power better to convert to speed.

NC Race

NC Race Bearings have a Nano coating on outer & inner races, This dry film can minimize the coefficient of friction to as low as 0.03 dynamic, and 0.07 for static. The Nano Coating overcomes or reduces mechanical lubrication problems improving performance and extending service life >300%

Supra LV Fluid

Supra LV is a special Low Viscosity lubricant for the ceramic Pulley Bearings. It offers high flow characteristics for a fast and smooth operating environment. Easy to lubricate in maintenance without removing the seal of the bearing.

Zero Contact Seal

ZERO Contact Seal, a non-contact bearing seal, provides complete coverage without increasing rotational resistance, striking the optimal balance between efficiency and protection.