Shimano Altus M311 cranksets provide durability and reliable shifting for triple chainring drivetrains. - Hyperdrive SG-X chainrings - 7/8-speed compatible - Spindle interface type: Square Taper JIS
Shimano's Dura-Ace Track Cranks transform every last watt into oval-scorching speed in the velodrome. These cranks set the bar for low weight and unmatched efficiency, with hollow forged aluminum crank arms and an Octalink bottom bracket (sold separately) for power transfer and acceleration that will blow you, and those trying to hold your wheel, away.
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