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1. 9/10/11S road bikes in the middle of the chainring
2. The chainring is 3MM aluminum, the crank AL-6061-T6 has good strength.
3. The middle-through chainring is lightweight and easier to ride.
4. Light pedaling and not easy to fall off.
5. CL: 50mm
6. BCD: 110mm
7. Q-FACTOR: 155mm
8. Chain line: 50mm
9. B.B.Axle: 2497mm
八、 Chain line:50mm
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