Pair of Shimano Xt 12v Tripeak Hollow Pulleys Rd-m8120/m8130 - Silver

Before AOPW ,
the complex process of upgrading to oversized pulley wheels
made it challenging for enthusiasts to dive.
AOPW makes it simple.
With just a common hex key,
you can effortlessly swap to the larger AOPW 18T .
No need to worry about adjusting the chain length＊
Install AOPW
hit the road
for an immediate experience
smooth and high speed!
＊ After installation, it is still necessary to check the chain length and voltage spacing B.

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. The simultaneous adoption of large-diameter bearings significantly improves the smoothness and stability of pedaling performance.

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

The pulley's hollow frame design allows for a significant increase in bearing size, providing superior rotational performance and stable support for the oversized 18T 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!

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

The narrow and wide tooth design allows the pulley to fit the chain better, significantly improving operational stability.

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 the raceway, seal, lubricant and balls. Jetstream Pro Series offers the right composition for the purpose. The JetStream Pro Series delivers exceptional efficiency and durability, backed by a reassuring four-year warranty for users.

Perfectly round G3 grade ceramic balls create lower rotational resistance, allowing your power to be better converted into speed.

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

Supra LV is a special low viscosity lubricant for ceramic pulley bearings. It offers high flow characteristics for a fast and smooth operating environment. Easy to lubricate in maintenance without removing the bearing seal.

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