Parametric MTB bash guard ring/chain disc
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Fully parametric FreeCAD model for a chain retainer disc. With 5 spoke 153mm diameter/100mm hole distance model included
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Model information
- Source
- Printables
- Category
- Outdoor Sports
- License
- Creative Commons — Attribution — Share Alike
Parametric MTB Front Gear Chain disc/Bash guard
Front gear bash ring/chain retainer for both sides to protect the front gear of a (kids) mountain bike and help guide the chain. The FreeCAD file is parametric and can be used to adjust the model if needed. The included 3MF file will fit a TREK 20inch kids MTB.
Measurements of 3MF file
Total diameter is 153mm
5 spokes
100mm diameter hole placement
Additional hardware needed
5 x M3 bolts (length 16-20mm depending on bike)
5 x M3 hex nuts
Inner ring has two variants, with and without slit. Depending on if you're comfortable with disassembling more of the bike or not.
Parametric FreeCAD file available for easy remixing
I've used FreeCAD to model the parts (https://www.freecad.org/). Feedback on the design techniques is greatly appreciated.
