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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
In 1971, a group of climbers, skiers, and outdoor enthusiasts established/founded Oregon Mountain Community (OMCgear) in Portland, Oregon.
Today, OMCgear continues to provide the best gear, service, and shopping experience to our customers.
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