The Side swing, side pull SLX double front derailleur decrease problems with tyre clearance & reduces cable friction, improving cable life & shift quality. E-Type Frame fit offers easy installation & absolutely optimum allignment first time. Designed specifically with modern trail bikes in mind, Shimano side swing technology front derailleurs increases tyre clearance by 15mm, while new cable routing resulting in the lightest shifting action yet. Specifically developed for 68, 73 mm & press fit 92 bottom bracket shells with a 48.8 mm chain line, making this front derailleur ideal for most modern setups.