ISCG bash guard

thingiverse

I'm designing a simple bash guard to work with frames that have ISCG05 mounts. Second and third photos show the aftermath of a pretty hard hit on a large rock in Bear Brook state park in NH - it definitely works! Various sizes are available to clear different chainrings ranging from 28t to 38t. Two designs of each are offered, one for standard M6 screws and another with bolt holes chamfered to work with flat head M6 screws. This design was created for and tested on a 2019 Trek Fuel EX 9.9 with a 32t SRAM GX Eagle chainring. It may work on other bikes/chainrings, but I have no idea if it will. The parametric design allows you to set the chainring teeth under "Modify... Change Parameters" from anything 28t or larger - 26t runs into interference issues with the front bolt hole and the bash guard itself. Custom text can be added by editing Sketch2 and unsuppressing Extrude7 in the F3D file. The "47" text in the photos is my own thing which is removed from the posted files. For a similar design, see: Bike Bash Guard for ISCG05 tabs by Drazen. I originally had provision for using all three tabs but didn't see the point of using the top bolt.