Black 13T Mountain Bike Aluminium Jockey Wheel Rear Derailleur Pulley (black,13T)

Description: The pulley is made of aluminum alloy, so that it is very firm, lightweight and durable. Anti-rust and corrosion resistant. It run on smooth ball bearings, and it"s a necessary accessory for your bicycle. There are four different colors for you to choose from, to meet different needs. Hope you will enjoy your cycling. Have a nice day. Features: 1. Made of CNC aluminum alloy, lightweight and durable. 2. Anti rust and corrosion resistant anodized. 3. These pulleys run on smooth ball bearings. 4. A necessary accessory for your bicycle. 5. Fits for almost all mountain bike of 11T or 13T. Specifications: Material: Aluminum Alloy Color: Black, Red, Golden, Silver Weight: approx. 13g, 16g Teeth: 11T, 13T (optional) 11T Diameter: approx. 40mm / 1.57" Hole Diameter: approx. 5mm / 0.19" 13T Diameter: approx. 49mm / 1.92" Hole Diameter: approx. 5mm / 0.19" Compatible: Suitable for 4/5/6mm spindle shaft rollers Package Included: 1 x 11T/13T pulley wheel