Shopping from link below:
100 BCD, round
Speed: 12/11/10/9 speed, Support both Sram and Shimano 12 speed chain
Color: black anodized
Fit for shiman.o M7100 M7120 M7130 M8100 M8120 M8130
Notes: this chainring not work with M5100 and M6100.
You need buy a 12 speed chain link if your chain is shimano 12 speed. Otherwise it will make trouble.
It does not come with bolts, as it must use original bolts.
Surface treatment: Anodize, high speed CNC
Material: High strength Aluminum 7075-T651, supplied by USA company Aleris who is supplier to aircraft make Airbus, Boeing and Bombardier.
CNC process precision:0.03mm
1 x chainring
Tooth Max diameter(mm) Weight(g)
32 T , 138 mm , 52 g
34 T , 145 mm , 58 g
36 T , 154 mm , 60 g
38 T , 162 mm , 66 g
40 T , 170 mm , 72 g
42 T , 178 mm , 79 g
44 T , 186 mm , 88 g
46 T , 194 mm , 96 g
48 T , 202 mm , 105 g