DJC Stone Bearing Bike Pulley Wheel Derailleur Pulley 8 9 10 11 speed Narrow Wide Tooth Guide Roller 10t 12t 14t 16t MTB Road Bike Derailleur Over Sized Jockey

Features
8-11 speed support. Narrow wide tooth, fit for 8/9/10/11 speed chain( not support 12s system).
Body made by Polyoxymethylene (POM) high strength resin,stiffness but lightweight. High precision CNC process.Weight: 9g/10g/12g/15g, Thickness: 8mm.
Sealed stainless bearing 689RS, it is a customized low sideplay bearing. Offer smooth riding and low noisy.
Broadly compatibility: 8-11 speed. works for Shimano and Sram Derailleurs, also works for other brand Derailleurs include MTB and road bike. Install hole diameter: 6mm (compatible with 4/5mm)
1 Year Warranty. Package Content: 1* pulley wheel, 1* adapter for 4mm to 6mm, 1* adapter for 5mm to 6mm

ABOUT
Stone Design Workshop focus to offer high quality and innovated design CNC processed chainrings to clients in worldwide, especially favored by EU race teams.
Material is basic of everything, Aluminum 7075 T651 supplied by famous USA aluminum manufacturer.
CNC machine with high process precision up to 0.03mm.
We are not only a factory, we are a chainring designer with state-of-the-art innovative design. Wish to offer customers stiffness, light weight, low noisy, drop-stop and durable chainrings.
Stone products meet requirements for all heavy duty cycling sports, Downhill, CX, Gravel, Traction and so on. Ensure all chainrings lifespan 15,000 km.