Shimano Altus FD-M311 Dual Bottom Front Derailleur for Mountain Bikes
Item DescriptionWide link pivot design for increased rigidity and responseConvertible between top-pull and bottom-pull cable routingLow clamp (top swing) or high clamp (down swing) modelsUni-band version fits 34.9/31.8/28.6mm seat-tubes with included shimsFor 63-66 or 66-69 (most common) degree chainstay/seat-tube anglesItem Specificationsclamp: high (M311-6)pull: top/bottomspeed: 7/8spclamp dia.: uni-bandcapacity: 20Tmax: 42-48Tcs/st angle: 66-69 deg: