Size:11T Style:Fashion Material type:/Aluminum alloy Number of items:1 Outer material:/Aluminum alloy Features:150 Included components:Chainring Batteries included?:No Department:Unisex Package Dimensions:12 x 8 x 3 cm; 11 Grams Feature: 1. Equipped with a hole diameter 4mm sleeve, original hole diameter 5mm, if the original sleeve is removed, the hole diameter can be changed to 6mm, 4/ 5/ 6 shaft pulley screw can be applied. 2. Made of high quality materials, durable and practical. 3. Easy to install and use, provide good usage experience. 4. Wonderful accessory for mountain bike. 5. 2 different types for you to choose, meet your different needs. Specification: Condition: 100% brand new Item type: Bike Rear Derailleur Pulley Material: aluminium alloy Color: colorful Optional type: 11T, 13T 11T diameter: Approx. 41mm/ 1. 6in 13T diameter: Approx. 49mm/ 1. 9in Specification: applicable to the guide wheel of 4/ 5/ 6mm axis. Guide wheel selection rules: Please try to choose the same as the original guide wheel, if there is no same, you can choose smaller than the original guide wheel, can not choose a larger one. Applicable: for SRAM and micro rear derailleur Package List: 1 Set x Bike Rear Derailleur Pulley Robus and durable: Guide Roller Part Jockey Wheels is made with high quality aluminum alloy materials, durable and practical, high resistance, robust and can give you a long duration. Complete set : Equipped with a diameter of the 4 mm sleeve hole, diameter of the original 5 mm hole, if the original sleeve is removed, you can apply the diameter of the hole in 6 mm, 4/5/6 with screw of the pulley of tree. Complete set : Equipped with a diameter of the 4 mm sleeve hole, diameter of the original 5 mm hole, if the original sleeve is removed, you can apply the diameter of the hole in 6 mm, 4/5/6 with screw of the pulley of tree. Driving wheel selection rules : Try to choose the same as the original guide wheel, if there is no same, you can choose smaller than the original guide wheel, you cannot choose a bigger one. Excellent accessories : The pulley of the rear derailler of the mountain bike is a wonderful accessory for the mountain bike. There are 2 different types to choose, meet your different needs, is a wonderful accessory for mountain bikes and street bikes. Robus and durable: Guide Roller Part Jockey Wheels is made with high quality aluminum alloy materials, durable and practical, high resistance, robust and can give you a long duration. Complete set : Equipped with a diameter of the 4 mm sleeve hole, diameter of the original 5 mm hole, if the original sleeve is removed, you can apply the diameter of the hole in 6 mm, 4/5/6 with screw of the pulley of tree. Complete set : Equipped with a diameter of the 4 mm sleeve hole, diameter of the original 5 mm hole, if the original sleeve is removed, you can apply the diameter of the hole in 6 mm, 4/5/6 with screw of the pulley of tree. Driving wheel selection rules : Try to choose the same as the original guide wheel, if there is no same, you can choose smaller than the original guide wheel, you cannot choose a bigger one. Excellent accessories : The pulley of the rear derailler of the mountain bike is a wonderful accessory for the mountain bike. There are 2 different types to choose, meet your different needs, is a wonderful accessory for mountain bikes and street bikes.