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I agree with narrow going through snow and mud easily. But the look is to be proportionately tall to fill the fender well. A 7.5 -16 is only 31.8 tall/diameter.

I have not seen a 255/85R 17 but a 255/80R17 should be 33.1 tall/diameter it is not so narrow as said at 10 inches compared to 7.5 or 8 inches. 255 is typical LTtruck or SUV width.

I feel to get narrow down to the 8.5 to 7.5 inches you have to increase the rim diameter. In my research the 17 or 18 inch rim are wide rims that in order to get a 33" diameter or better the minimum tire widths start at 255, and 285 respectively.

Prove me wrong but the 19.5 is a unique size relegated to 5th wheel campers and steering tires. There they make pizza cutter tires (8 wide by 33 high) for low rolling resistance or easy turning.

Anybody done it or am I going to be the first.