Link to Buy:
STONE Chainring adapter, narrow wide, Rotor to 104BCD, single speed
Material: High strength Aluminum 7075-T651, supplied by USA company Aleris who is supplier to aircraft make Airbus, Boeing and Bombardier.
Material Hardness: HB150
Fit for: Rotor 30mm axis before 2018, single speed
24mm axis can not use. 2018 can not use.
Surface treatment: Anodize, high speed CNC
1*chainring, 4* bolts