Bike Chain Roller Cog (13t) for Shimano Derailleur

thingiverse

Tuned as a direct replacement for Shimano's 13-tooth roller cog, this part is specifically designed for use on the upper cog. While the original lower cog may differ, its geometry should still mesh seamlessly with this new component. To ensure smooth operation, parameters need to be adjusted or scaled accordingly, allowing the small steel sleeve bearing to snap into place without excessive drag. The tuning process has already been completed, but slight variations might be necessary depending on the specific print and sleeve used.