This Sunrace FCM600 Chainset helps to ensure optimal power transfer, featuring a 7/8 speed 42/32/22T drivetrain and 170mm crank arm length. Its alloy construction ensures increased durability, allowing you to experience smoother cycling with fewer interruptions. Product features: Use: MTB / Trekking Group: M6 Model: FCM600 Gradation: 42-32-22T Threaded BB shell width: 68mm Gear: 7/8-speed Construction: Square Taper Compatible Chain: 7/8-speed PCD: Riveted Chain line: 50mm Chain Protection Ring: Yes Crank arm length: 170mm Crank arm: Aluminum Large Chainring: Steel Middle Chainring: Steel Small Chainring: Steel