Precision Machined Chainring Bolts for Single-Ring Drivetrains These single chainring optimized bolts have a 4 mm hex socket on the bolt and a 6 mm hex socket on the nut so no spanner is needed These are 6 mm long so they work perfectly with any bolt on single chainring that does not have threaded standoffs 4 bolts and nuts weigh only 8 grams, size M8 x.75 x 5 7075-T6 aluminum, Made in the USA
