- Aluminum bolts for 30 tooth x 104BCD chainring with M8 x 0.75 threaded bolt holes - 10mm long, compatible with a bash ring (bolt length is laser engraved on the head) - 5mm hex, torque to 6-7 Nm maximum with light grease on the threads - Made in the USA from 7075-T6 aluminum alloy - 7g/4-bolt set
