Shimano Altus Crankset 7/8S 48/38/28T 170mm - Black

This chainwheel set from Shimano is the Altus FC-CM311 triple crankset built for reliable everyday shifting on 7 and 8 speed bikes. The 48-38-28T gearing gives you a wide range for commuting and trekking, with an easy inner ring for climbs and a larger outer ring for steady cruising. With 170 mm crank arms, an included chain guard, and a square taper setup matched to a 123 mm BB shaft length, it’s a practical replacement choice for classic city and trekking drivetrains.

- Triple 48-38-28T gearing provides a wide range for hills and flat roads
- Compatible with 7 and 8 speed drivetrains for versatile replacement use
- 170 mm crank arms suit many standard adult bike setups
- Included chain guard helps reduce clothing contact and keeps the bike cleaner
- 4-arm design supports stable shifting and chainring alignment
- Designed to work with a 123 mm square taper BB shaft length
- Offset -5 mm for correct chainline on compatible frames
- Durable everyday crankset choice for commuting and trekking bikes

Specifications
Brand: Shimano
Model: FC-CM311
Series: Altus
Type: Crankset
Intended Use: City commuting, trekking, leisure touring
Speed Compatibility: 7/8
Drivetrain Compatibility: Shimano 3x
Crank Arm Length: 170 mm
Crank Arm Interface: Square taper
Spindle Length: 123 mm
Boost Compatibility: No
Chainring configuration: 48-38-28T
Number Of Chainrings: 3
Chainring Sizes: 48T / 38T / 28T
BCD: 4-arm
Chainring Mount Type: Bolt-on
Narrow-Wide Teeth: No
Chainring Offset: -5 mm
Chainring Replaceable: Yes
Includes Bottom Bracket: No
Includes Chainring(s): Yes
Color: Black