Chain keeper

thingiverse

Parametric chain keeper design tailored specifically for use with 1x drivetrains. Customize this design to suit your preferences. No testing has been conducted within the parameter space. Not yet tested or printed, unverified. Designed to accommodate two M4 x 20 socket head cap bolts and two M4 locknuts (7 mm width by 5 mm height). Print both halves after adjusting the file for your frame's specifications. The STLs are designed for my frame, a Fuji Jari, with the following geometry: - BBDrop: 69 mm - ChainStayLength: 435 mm - SeatTubeAngle: 74.5 degrees - SeatTubeDia: 34.9 mm - 42T ring A sample Bike.sldasm is provided for visual context. The chainring is 43T in this example, and the DiaToothRatio is calculated as 178 mm / 43 teeth. The chainline is adjusted to a chainline of 50 mm. The necessary parts for assembly (crankset & frame) can be found in the Reference folder, which I hope have been successfully uploaded. Credit goes to Plamen Cherkezov for creating the frame model and Morar Adrian for modeling the SR Apex crankset, both available on GrabCAD.