Shopping from link below:
STONE 104BCD Oval Chainring
Material: Aluminum 7075-T651 from Aleris USA
Color: black anodized
Size: 104BCD
Fit for : Shimano M590/610/615/670/675/770/785/780/970/980/820/430
for SRAM Most 30s Crank X0/X5/X7/X9 XF
Thickness:4MM
Stiffness: 150HB
Fit chainring: 9/10/11/12 speed,1xspeed
Support both Shimano and Sram 12 speed system
Package Contents:
1 x bike Chainring, 4 bolts
Tooth Max diameter(mm) Weight(g)
34 T , 154 mm , 50 g
36 T , 162 mm , 62 g
38 T , 170 mm , 69 g
40 T , 178 mm , 72 g
42 T , 186 mm , 78 g
44 T , 194 mm , 86 g
46 T , 202 mm , 98 g
48 T , 210 mm , 109 g
50 T , 218 mm , 118 g
