Tripeak Jetstream Pro AOPW-AERO Oversized Pulley Wheel System 12/18T - SHIMANO 12s / SRAM E1 12s

Aerodynamics Evolved. Performance Refined.

The Tripeak Jetstream Pro AOPW-AERO is the latest evolution of Tripeak's oversized pulley wheel system, developed for riders looking to optimise every detail of their drivetrain. Combining an all-new aerodynamic cage design with oversized pulley technology, it's engineered to reduce drag, improve drivetrain efficiency and deliver consistently smooth, precise shifting. From the aerodynamic Flow-Cover to the oversized 18T pulley and Nano-Coated Ceramic Bearings, every component has been designed to maximise efficiency without compromising durability or reliability.

Key Features

• Aerodynamic Flow-Cover design reduces drag by approximately 10–15%

• Oversized 12T / 18T pulley configuration for improved drivetrain efficiency

• Injection-moulded composite pulley construction

• NC Nano-Coated Ceramic Bearings with G3-grade ceramic balls, SUPRA LV FLUID included

• Zero Contact bearing seals and Supra LV low-viscosity lubricant

• Narrow-Wide tooth profile for quieter, more secure chain engagement

• Patented asymmetric cage design

• No chain length adjustment required during installation

• Compatible with Shimano and SRAM 12-speed road drivetrains

• Backed by an industry-leading 4-year warranty

• Weights - 9g Upper Pulley, 31g Lower Pulley
  

Aerodynamic Flow-Cover Design

The newly developed Flow-Cover surrounds the lower pulley with a smooth outer surface while incorporating an integrated inner guide plate to improve chain control. By refining airflow around one of the most turbulent areas of the drivetrain, the Jetstream Pro reduces aerodynamic drag by approximately 10–15% compared with Tripeak's previous AOPW design.

Why an 18T Pulley?

Most rear derailleurs use a range between 11t to 14t sized pulley wheels,  forcing the chain to bend through a relatively tight angle as it passes through the derailleur.

The Jetstream Pro increases this to an 18-tooth oversized pulley, allowing the chain to follow a shallower path with less articulation. Less chain deflection means lower mechanical resistance, smoother chain movement and more efficient power transfer.

The larger pulley also houses a larger bearing, which rotates more slowly for a given cadence. This helps reduce bearing loads while contributing to improved durability and consistently smooth performance over thousands of kilometres.

Why Composite Pulleys?

Rather than pressing bearings into a traditional aluminium pulley, Tripeak uses an injection-moulded composite pulley that fully encapsulates the bearing.

This creates an exceptionally precise, zero-tolerance fit between the pulley body and bearing while increasing wear resistance and reducing drivetrain noise. The composite material is also kinder to the chain than a machined aluminium pulley, helping extend the service life of both the pulley wheels and the chain.

Combined with Tripeak's Narrow-Wide tooth profile, the result is quieter operation, improved chain retention and smooth performance in all riding conditions.

Nano-Coated Ceramic Bearings

The Jetstream Pro uses Tripeak's premium NC Nano-Coated Ceramic Bearings, featuring precision G3-grade ceramic balls, nano-coated bearing races and Supra LV low-viscosity lubricant.

The nano coating significantly reduces friction between the bearing surfaces while improving wear resistance, while the Zero Contact Seal protects against contamination without introducing unnecessary drag. Together, these technologies deliver exceptionally smooth rotation, long service life and consistent performance in real-world riding conditions.

Compatibility

The modular Jetstream Pro system includes all the hardware required for compatibility with:

• Shimano Dura-Ace R9200 12-speed

• Shimano Ultegra R8100 12-speed

• SRAM RED AXS E1 12-speed

• SRAM Force AXS E1 12-speed

Tripeak's patented asymmetric cage design allows the oversized pulley system to integrate seamlessly with the original derailleur architecture, without requiring chain length adjustments during installation.

Why We Stock It

Oversized pulley systems are about far more than ceramic bearings. The Jetstream Pro stands out because every element has been engineered to work together—from the aerodynamic cage and oversized pulley geometry to the composite pulley construction and advanced bearing technology. It's a considered upgrade for riders looking to reduce drivetrain losses, improve shifting performance and build a bike where every detail has been carefully chosen.

 ______________________________________________________________________

Proven at the Highest Level

Performance isn't just developed in the workshop—it's proven in the peloton. The Tripeak Jetstream Pro AOPW-AERO is trusted by riders competing at the highest level of professional cycling, including the XDS Astana Team and Lidl–Trek. Developed to meet the demands of WorldTour racing, it delivers the efficiency, reliability and precision shifting expected when every second counts.