Sand ladder / Traction board in both 1/10 and 1/35 scale. For other scales just scale one of these in your slicer. Nice addon for your scaler crawler :)
The 1/35 version has slightly smaller holes because with a .4mm nozzle the dimples wouldn't print if you scale down the 1/10 version to 1/35.
I made this for my 1/35 Orlandoo Hunter Jeep Rubicon OH35A01.
The 1:1 version would be 150x44cm.
Use small layer height for 1/35 version! It's only 0.57mm high :)
The 1/10 version is 2mm high so 0.10mm layers should be fine.