Shimano SLX M677 10 Speed Chainset - 38/24t - 170mm Crank Arm - SilverShimano SLX M677 10 Speed Chainset 38 24t 170mm Crank Arm Silver This SLX crankset takes its technology from the Deore and XTR range of components and implements them into a reliable and excellent value crankset. This crankset features Hollowtech II, hollow forged crankarms; this adds strength and makes it incredibly durable, whilst keeping the weight down. The SLX M677 crankset is at home on any All Mountain bike, its tough and aggressive