Shimano's Ultegra Compact Crankset boasts hollow-forged-aluminum arms and a hollow aluminum big ring. These technologies combine for impressive weight savings and superb strength. An integrated bottom bracket axle provides super-efficient power transfer, while chainrings with ramps, pins and notched teeth deliver lightning-quick shifting.
The Shimano FC-M371 crankset for square bottom brackets features a rigid 2-piece construction and Hyperdrive SG-X chainrings. - Chain guard included - 9-speed
• Forged steel • 24 TPI
• One-piece • 170mm • 24 TPI
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