Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - 5% larger tires (effect on odometer/MPG calculations?)

ratgreen · 08-06-2019, 09:27 AM

Its a trade off, so depends on your normal driving.

Larger tyres requires more torque to get moving = uses more fuel to get up to speed.

Once you are up to speed then they will lower your rpm (usually better for mpg, also probably the most torque-y part of your engines powerband). They will also traverse bumps in the road better.

So they make sense if you do lots of highway driving but not if you are a city driver.

08-06-2019, 09:27 AM	#20 (permalink)
ratgreen EcoModding Lurker Join Date: Jan 2017 Location: UK Posts: 29 Thanks: 11 Thanked 16 Times in 9 Posts	Its a trade off, so depends on your normal driving. Larger tyres requires more torque to get moving = uses more fuel to get up to speed. Once you are up to speed then they will lower your rpm (usually better for mpg, also probably the most torque-y part of your engines powerband). They will also traverse bumps in the road better. So they make sense if you do lots of highway driving but not if you are a city driver. __________________ '98 OM606 E class Merc Running on veg oil 35mpg average (tank to tank) 225 45 17 > 215 55 17 @ 55psi LED lights all around inc headlights Planned: electric turbo turbine generator (WIP), EGR coolant heat exchanger, Front air dam, solar panel, lithium battery pack, alt delete, full undertray, weight reduction, block insulation, engine bay insulation.