HSC Ceramic Pulley Wheels - Shimano GRX - 10/11/12 Speed Gravel
 
Designed for Shimano Gravel GRX 10/11/12-speed rear derailleurs, our range of pulley wheels gives you different options for tooth count, wheel material, and tooth profile to suit your riding style and drivetrain requirements.
 
At the heart of every pulley wheel are HSC ceramic bearings, assembled in Australia with over 20 years of experience in ceramic bearing technology. The result is a durable, smooth-spinning pulley wheel designed to deliver crisp shifting, low friction, and reliable performance for your Gravel experience.
 
Our pulley wheels have also been tested by top Gravel/MTB cyclists, including Søren Nissen, UCI MTB Marathon Winner.
 
Pulley Compatibility:
11/11 Tooth Delrin Pulley Wheels: 
GRX 10-Speed: RD-RX400
GRX 11-Speed: RD-RX812, RD-RX817
 
12/12 Tooth Delrin Pulley Wheels:
GRX 10-Speed: RD-RX400
GRX 11-Speed: RD-RX810, RD-RX812, RD-RX815, RD-RX817
GRX 12-Speed: RD-RX820, RD-RX822-GS, RD-RX822-SGS, RD-RX825, RD-RX827-SGS
 
13/13 Tooth Alloy Pulley Wheels:
GRX 11-Speed: RD-RX810, RD-RX815
GRX 12-Speed: RD-RX822-GS, RD-RX822-SGS, RD-RX827-SGS
 
Pulley Wheel Material:
Delrin: Durable, lightweight, and quiet. A practical and affordable option for reliable everyday MTB performance.
Alloy: Strong and long-lasting, with a slightly higher operating noise than Delrin. The alloy construction also provides a sleek and premium appearance.
 
Pulley Tooth Count:
11T – 42 mm diameter: The most versatile option and compatible with most short-, medium-, and long-cage systems.
12T – 46 mm diameter: A larger pulley wheel designed for medium- and long-cage systems. It offers smooth chain movement and potential efficiency benefits.
13T – 51 mm diameter: Suitable for medium- and long-cage systems. The larger diameter can provide smoother chain articulation and potential efficiency benefits.
Larger pulley wheels can offer efficiency and smoothness benefits, but compatibility with the derailleur cage is essential.