The SRAM Apex front derailleur is made to easily shift between any of the double chainring configurations offered on the Apex cranksets. It aesthetically matches the rest of the group to boot. Mates perfectly with the SRAM Apex DoubleTap shifters for ZeroLoss shifting where cable is pulled the as soon as the shift lever is moved. Aluminum body with steel cage. 89 grams (braze-on).