Bicycle chainguard bashguard
thingiverse
I upgraded to an internal gearhub and removed the two smallest and largest of the three leading gears. This modification provides protection for the FSA system with its large star removed. I'm not sure, but it might fit a crankset with all three gears. It should be suitable for cranksets with a BCD of 104. I created several models in increments of 10mm so that you can find your size. The number in each model name represents the outer diameter. You can measure this on your gear with a chain. You can also create a copy of your desired size on Onshape at https://cad.onshape.com/documents/bf10d43333369e0dc042dac4/w/0e116f503a80b46a00624a9a/e/4c4aa2dbee200faa86079927. Maybe it will even fit a full crankset.
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