Wheels manufacturing Hanger WMfg Dropout-25 Upgrade or replacement rear derailleur dropouts; stiffer & more rigid to improve shifting performance CNC machined from solid 6061 aluminium to exact tolerances Stiffer than any original equipment hanger which improves shifting performance Still breaks before your frame does to perform its main function All hangers come with instructions & hardware Direct replacement for original equipment with guaranteed fit Black anodised for extra scratch & damage resistance Laser etched for easy part identification