FSA Full Speed Ahead Energy Crank/Bottom Brackets Sets 39/53 FSA Energy 175mm S10 39/53t 130bcd with MegaExo Bottom Bracket, Black

FSA Full Speed Ahead Energy CrankBottom Bracket Sets for Shimano 10speed drivetrains with hollow forged arms result in superior strength and stiffness and a higher strengthtoweight ratio compared to solid arms. Compatible with pre7900 and 6700 10speed Shimano, SRAM and Campagnolo Ultra Narrow drivetrains unless noted MegaExo is an integrated crankBB system with oversized BB axle and oversized, external cartridge bearings in alloy cups 7900 and Campagnolo 11 Speed com