Material: High strength Aluminum 7075-T651, supplied by USA company Aleris who is supplier to aircraft make Airbus, Boeing and Bombardier.
Material Hardness: HB150
Color: black
Weight:about 31g
Fit Crank:for Sram MTB direct mount GXP,DUB model 3 bolts mounting crank.
fit for BMX,climbing,stunt bikes which require large transmission ratios and high bursts.
Offset:4mm inner offset
Surface treatment: Anodize, high speed CNC
Package content:
1*chainring