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Execut1ve · 01-09-2011, 02:14 PM

I'm in the fantasy stage of putting bigger tires on my truck. I'm considering the interaction between tire size and fuel mileage. Currently on the truck the tires are about 29" and I would be stepping up to 31's or 33's if I went bigger.

Pros: lower RPM at cruising speed

Cons: tires weigh more and have greater moment of inertia

Not sure: larger tires act like taller gears, so I would probably experience reduced power and acceleration from a stop. unsure how that would influence fuel econ

Anyone else want to weigh in? Any thoughts on what the overall effect on fuel econ would be? Thanks!

01-09-2011, 02:14 PM	#1 (permalink)
Execut1ve EcoLurker Join Date: Dec 2010 Location: Springfield, OH Posts: 116 truck - '94 Ford F150 XLT 90 day: 13.15 mpg (US) civic - '00 Honda Civic EX 90 day: 36.24 mpg (US) Thanks: 1 Thanked 1 Time in 1 Post	fuel mileage and tire size I'm in the fantasy stage of putting bigger tires on my truck. I'm considering the interaction between tire size and fuel mileage. Currently on the truck the tires are about 29" and I would be stepping up to 31's or 33's if I went bigger. Pros: lower RPM at cruising speed Cons: tires weigh more and have greater moment of inertia Not sure: larger tires act like taller gears, so I would probably experience reduced power and acceleration from a stop. unsure how that would influence fuel econ Anyone else want to weigh in? Any thoughts on what the overall effect on fuel econ would be? Thanks!