Acera Crankset, trekking and FC M361 Square 7/8 speed Hyperdrive SG-X chain blades Integrated Chain Guard Dual SIS compatible interchangeable rings, group: Acera Model: FC M361 Rear Case Width – Side to Side: 68/73 mm Speed: 7/8 speed type: Square Compatible : HG 6/7/8 speed chain bolt circle: 104/64 mm large chain wheel: Steel Medium Chain Wheel: Steel Small Chain Wheel: Steel Chain line: 50 mm Suitable for trekking perfect control: Acera the component group Acera stands for 3 features:, Precision accurate and look. This group allows for accurate switching with less loss of pedal power. It provides high Bremskraftund outstanding braking effect.