Bash guard for 3x to 2x conversion

thingiverse

If you want to upgrade your 3 speed crankshaft to 2 speed, you need a washer to attach the ex-middle, now top ring. Instead of using washers, I made a very simple bash guard. You simply replace the biggest chain ring with it and you are done. It fits my Shimano Deore crankshaft (FC-M542), but since it's inside is sized after the outside chain ring, it's probably fits other crankshaft too. Chain ring size is 36T