Chain keeper

thingiverse

Parametric chain keeper design, for use with 1x drivetrains. Customize to your liking. I haven't tested the parameter space. Untested/never printed. Designed for two M4 x 20 socket head cap bolts & two M4 locknuts (7 mm width by 5 mm height). Print both halves after adjusting the file for your frame. The STLs are for my frame, a Fuji Jari, with the following geometry: - BBDrop: 69 mm - ChainStayLength: 435 mm - SeatTubeAngle: 74.5 deg - SeatTubeDia: 34.9 mm - 42T ring Sample Bike.sldasm provided for seeing it in context. The chainring is 43T in this example. The DiaTotoothRatio is found by 178 mm/43 teeth. The chainline is adjusted to my chainline of 50 mm. Parts for the assembly (crankset & frame) are found in the Reference folder, which I hope are successfully uploaded. Credit goes to Plamen Cherkezov for creating the frame model & Morar Adrian for the SR Apex crankset model, over on GrabCAD.