Single (1x) chainring bolts

Chainring bolt & nut models, for use with 1x drivetrains.

More precisely, you should be able to use them with any single-specific crank (track, single-speed), or to mount a standard (narrow-wide or not) chainring to a double/triple crankset.

If you use a double crankset + single chainring, you may need a spacer to push the ring closer inboard. I suspect it should be about a 2-3.5 mm spacer. It depends on the chainline of your crankset.

Wolf Tooth's standoff measurement varies: 3.5 mm for a mountain crankset (https://www.wolftoothcomponents.com/collections/chainrings/products/94-bcd-for-5-arm-cranks) & about 2 mm for a road double crankset (https://www.wolftoothcomponents.com/collections/chainrings/products/130-bcd-cyclocross-chainrings)

A Solidworks model somewhat based off of the Inventor model by KsCustoms over at GrabCAD (https://grabcad.com/library/chainring-bolts-8mm).

Design influenced by Wolf Tooth's chainring bolts (https://www.wolftoothcomponents.com/products/set-of-4-chainring-bolts-nuts-for-1x).

The thread is M8 x 0.75 (see Park Tool's Basic Thread Concepts page).

These are a bit shorter than the double/triple version (6 instead of 10 mm).

I wouldn't 3D print this. More of a reference model for testing assemblies.

Requires a 4 & 6 mm hex key to drive. No special spanner required.

Category: Replacement Parts