6/1/23: Our phones continue to have issues. We apologize if you have been trying to reach us, at times calls will ring but will not come through to us. Please reach us via e-mail at info@machineryrowbicycles if you are unable to get through to us and we will get back to you as soon as we can.
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