Shimano m4100 deore 10sp double front derailleurbringing even more adventure to your outdoor lifestyle, this front mech offers improved chain stability and sharp shifting on the trails. It features a robust alloy construction with a reinforced steel chain guide, which makes it more than ready for any off road ride. Designed with modern trail bikes in mind, shimano has equipped this model with side swing technology, which increases tyre clearance while its cable routing results in the lightest shifting action yet.features front mech material alloy chain guide material reinforced steel use mtb speed 10 speed mounting options direct mount, e type and low clamp options available to select chainline chainline both 48.8 51.8mmmax chainring for double 38 tooth max chainringpivot link wide pivot link designcable routing side pull cable routing single or pair single part number direct mount fdm4100d4 e type fdm4100e4 low clamp fdm4100mx4technologies side swing side swing, side pull front derailleur decrease problems with tyre clearance and reduces cable friction. Designed specifically with modern trail bikes in mind, shimano side swing technology front derailleurs increases tyre clearance, while cable routing resulting in the lightest shifting action yet. Wide pivot link wide pivot link design for greater torsional rigidity improves shifting response and service life.a 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products.buy shimano components from chain reaction cycles, the world's largest online bike store.