DJC Bike Chainring 104Mm BCD Round/Oval MTB 104BCD 30T to 52T 7/8/9/10/11/12 Spe
Chainring BCD(mm) 104BCD 104BCD 104BCD 110BCD for 5 Arm 130BCD for 5 Arm. Wrong BCD will not works. This 104BCD chainring support for Shimano M391 M430 M590 M610 M615 M610 M670 M675 M770 M780 M785 M980 M640 M820, and Prowheel, IXF 104BCD crankset.