egg headed, math-magician question for y'all..
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Joined: Jul 2006
Posts: 12,204
Likes: 10
From: Gainesville, Ga.
So, a 30 inch tall tire will have a circ of 94.25 inches. (approximately.) So, the 30 inch tire travels 94.25 inches per revolution.
A 35 inch tire has a circ of just about 110 inches. So, the 35 inch tire will travel almost 16 inches further per revolution......
Make sense?
adding 16 inches of tire rotation to a 94 inch tire is about.... lets see 16 divided by 94, help me out Jethro - naught from naught = naught, carry the one... = 17 % increase. that's a lot of torque sucking loss. i think you'll feel it directly in the seat of the pants if you change the tire size.
regarding actual towing weight, i suspect its a combination of many factors, but mainly safety related - strength of the frame, hitch, BRAKES... mostly brakes, lugs, and as said - wheels too.