Thread: Aggressive AT vs mt vs 15" vs 17"

Tyre conversion chart says 265x70x17 equates roughly with a 32x11.5x 15", and the 265x75x17 roughly matches a 33x12.5x15. These 15 tyres should be fine - they will be a little wider as the 265x75x17 will be more like a 10.5 width. Just a matter of checking one on truck for projection out past guards.

ATs fine until you hit wet mud, clay, snow, grass - then its all over rover! Narrow void AT treads fill up quickly losing all traction, and narrow treads don't self clear with spinning as do MTs. ATs can be fine if you pick your conditions for offroad use.

Yes a good idea to deflate tyres esp for travelling rocks or sand...more comfortable and bigger footprint. Dropping tyres down to 20-25lbs quite normal, and sometimes as low as 12lbs in loose sand - though then you have to watch for beads coming off rims.