• High strength aluminum alloy material, CNC processing, enhances the durability
• The choice of guide wheel: please try to choose the same as the original guide wheel, no the same can choose smaller than the original guide wheel
• 11T guide wheel is about 41mm in diameter, 13T guide wheel is about 49mm in diameter
• Compatible for Shimano/Sram rear derailleur

Specification: 

• Brand: MEIJUN
• Material: 7075 aluminum alloy
• Type: with 4/5/6mm shaft 
• Weight: 11T/9g, 13T/11g