Feature: 1. The Crank fit single, double and triple chainring 2. Fit for MTB Bike,XC/Off Road/AM bike modified single chainring. 3. Chainring fit 6/7/8/9/10/11/12 speed shimano sram chain,fit JIANKUN(IXF) crank and Shimano M370/M410/M610/M670/M780 crank (not fit M7000/M8000/9000). Fit SRAM/FSA/Prowheel 104bcd crank. 4. Crank fit single, double and triple Chainring, and 8/9/10/11 speed chain. 5. Better after-sales service,we will reply you within 24 hours! 6. Ship in 0-1 day and reach the delivery within 1-3 working days generally. Crank description: Brand: BUCKLOS Crank Arm length: 170mm Material: 7075-T6 Aluminum alloy Compatible: Single and double, Triple chainring Bolt Center Diameter: 104mm BCD Weight: about 541g (right & left) Color: Black Advantages: Light weight,stylish appearance,v.