Bash Guard 34T
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A Bash Guard for mountainbikes with up to 34T chainrings (ISCG-05).
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Updated at source:
Model information
- Source
- Printables
- Category
- Outdoor Sports
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
A Bash Guard for mountainbikes with up to 34T chainrings. It provides some protection from small impacts and also serves as a sacrificial barrier from bigger impacts. I've been using it for years now and can confidently say that it is more than capable of absorbing impacts.
The mounting is based on the ISCG-05 standard and utilizes two countersunk M6 screws. Using screws at least 16 mm allows them to go through to the other side, reinforcing the guard further. The elongated slots allow for some adjustment.
Print recommendations:
- Material: PETG
- Infill: 20% Cubic
- Perimiters: 3 (0,4 mm nozzle)
- Supports: Snug (Overhang threshold: 20 deg)
Picture 1, shows the current version made from PETG, mounted on a 2021 Trek Fuel EX 8 with Shimano Deore XT 30T chainring. A big impact resulted in a crack to form, however PETGs tougher nature kept it together for the rest of the ride.
In comparison you can see in picture 2 how another impact resulted in a previous prototype, (made of PLA with 5% infill) to split apart aggressively.