STILLMUSE 10T 11T 12T 13T 14T 15T Jockey Wheel Jockey Wheel Rear Derailleur Transmission Accessories Bike Ceramic Bearing Guide Bike Jockey Wheel Bicycle Rear Pulley Bike Rear Derailleur

Aluminium. Diameter of middle hole: 6mm/0.24in. Axis: Stainless Steel Shell, Ceramic Bearing Ball. Inner diameter of two derailleur tube: 5mm/4mm generally, a derailleur tube is inserted into the guide wheel by default). Application: compatible with most Rear Derailleur on the market. Product color: Red Black Multicolor Blue. Axis: Stainless Steel Shell, Ceramic Bearing Ball. Body material: 7075 aluminum alloy body Stainless steel shell ceramic bearing Ball. Specification: 10T11T12T13T14T15T16T17T. Package: 1PC Rear Derailleur Pulley+2 PCS Sleeve Tubes 4mm, 5 mm). Product color: Red Black Multicolor Blue. Fit for: 7/8/9/10/11 Speed Bike. Diameter of middle hole: 6mm/0.24in. Application: compatible with most Rear Derailleur on the market. Inner diameter of two derailleur tube: 5mm/4mm generally, a derailleur tube is inserted into the guide wheel by default). Feature: 1. High strength aluminum alloy, CNC processing, enhance the durable strength, 2. Deepen the tooth mark: can effectively