Raceface Narrow Wide 130mm BCD 44T Chainring 9-12sp BCD: 130 7075-T6 Aluminum BlackNarrow Wide tooth profiling ensures ultimate chain retention Stiff 4mm plate thickness and I beam construction transfer loads without flexing 7075 T6 aluminum, aerospace grade strength Reversible laser etched graphics. 130 BCD 9, 10, 11 and 12 speed compatible. TECH SPECS Material 7075 T6 Aluminum Primary Color Black BCD 130 Chainring Bolts 5 Narrow Wide Design Yes Position Single Speed 9 12 Teeth 44 Chainring Comp. Single