Quote:
Originally Posted by Shawn T. W.
Tom,
What I meant was that on take off it would be affected as more mass to get turning . . . but would probably work out to .001 mpg (depends on how often one took off from a start . . . aso larger diameter tires would also reduce acceleration, so you would use more fuel to get up to speed, but . . . once up to speed . . . you could gain it all back and then some, assuming one stays at highway speeds for the majority of the time.
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You are right. It will hurt acceleration two ways, one it will create more mass to overcome with the heavier wheel, and two it reduces the effective gear ratio making for slower acceleration. I did not mean to sound as if I disagreed on those points.
It might reduce economy around town driving too, but I doubt it.
The taller tires will also reduce braking leverage and thus braking ability as well.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.
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..I also have a 427 Cobra replica with an aluminum chassis.