Preload Adjuster (Race Face, 30mm Cinch)

(Temporary) replacement for Race Face's nylon Cinch crankset preload adjuster.

The original part is a known weak design, and the Cane Creek eeWings preload adjuster is recommended if you own any Race Face Cinch cranksets.

However, if you can't source either, this is an option to print. Seeing as the Race Face part costs ~$3, this isn't really worth making if you can get that.

Parts required:

• 3D printed part
• M3 x 10-12mm cap screw
• M3 nut

This model is designed to be printed without threads. Installation instructions:

• Slide printed piece onto 30mm spindle.
• Tighten M3 cap screw and nut until there is no play on the smooth section of the spindle, but just loose enough that it can still be spun.
• Push the printed piece against the NDS threads and turn clockwise, cutting the threads into the plastic. Keep turning until the adjuster butts out.You may need to use a rag for better grip. You can also use cutting fluid (although I didn't need it).
• Follow original instructions for the rest of the install.

This was reverse engineered based on photos of the Race Face and Cane Creek adjusters as I did not have an original part to measure. The STEP file is available if anyone wants to model the threads as well. This would be useful for SLA printing. FDM can't print such fine threads, but SLA should have no issue.

This must be printed using PETG or nylon. PLA is too brittle and hard, and wil likely have layer separation when tightened.

(Pictures shown are of an older version using an M2 screw.)