Bike Guide Wheel, Durable Aluminium Alloy Bearing Wheel Rear Derailleur for 4, 5, 6mm Spindle Shaft Rollers (11T-Red)

• Protection Bolt Derailleur: This bearing wheel rear derailleur is mainly used to protect the center bolt derailleur of the bicycle, so that the pulley runs on smooth ball bearings, thereby effectively extending the service life
• Improve Riding Efficiency: This bike guide wheel can not only effectively reduce the resistance when riding, but also improve the efficiency of riding, which allow you to enjoy the riding process more comfortably
• CNC Aluminum Alloy: This bicycle rear derailleur pulley is made of CNC aluminum alloy, which is lightweight, strong and durable, and has good rust resistance, which is very suitable for most bicycle enthusiasts
• Scope of Using: This derailleur pulley 11T has a diameter of about 1.57 inches, a hole diameter of about 0.19 inches, a 13T diameter of 1.92 inches, and a hole diameter of 0.19 inches which is suitable for most 11T or 13T mountain bikes
• Easy Installation: This bike wheel is very convenient to install and disassemble, which is suitable for the old derailleur, and 4, 5, 6mm spindle rollers

Description: The pulley is made of aluminum alloy, so that it is very firm, lightweight and durable. Anti-rust. It run on smooth ball bearings, and it's a necessary accessory for your bicycle. There are two 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 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 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 pulley wheel