Rubber Impact...
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New Member
Joined: Mar 2009
Posts: 58
From: Clawson, MI
Rubber Impact...
I was wondering the impact of larger tires on gas mileage...
Motor: 16 valve I-4 with 95 horse power and 98 lb-ft torque
Gearing: 4.62
Tire: 205/75/15
MPG: 27
Motor will have upgrades (new exhaust, intake, headers, blah blah)
New tires: 265/75/16 (14.35% bigger)
Is there a way to find how much it would hurt?
Motor: 16 valve I-4 with 95 horse power and 98 lb-ft torque
Gearing: 4.62
Tire: 205/75/15
MPG: 27
Motor will have upgrades (new exhaust, intake, headers, blah blah)
New tires: 265/75/16 (14.35% bigger)
Is there a way to find how much it would hurt?
BF Veteran
Joined: May 2009
Posts: 4,772
From: Halifax, NS, Canada
Hmmm...unless you're a really good mathmetition and can do a lot of tests I don't see a way to calculate it before actually trying it out?
Maybe someone could think up a calculation though. I do know the bigger tires tend to cause worse gas mileage.
Maybe someone could think up a calculation though. I do know the bigger tires tend to cause worse gas mileage.
New Member
Joined: Aug 2009
Posts: 52
From: VA
I dunno, but for every 1" of extra height on the tires of my full-sized truck, its about 10-15% hit in fuel economy. The real answer is, if fuel economy is what you are looking for, don't do performance mods.
Either it makes the vehicle too much fun to lay into the gas or it adds too much weight.
Besides, you're modding the car to look/drive better right? if you worried about fuel eco, you wouldnt put the money into parts (thats more money you could spend on gas).
Do the mods because you want to do the mods and just accept that you will take a hit somewhere else.
The general answer is that More rubber on the road = more weight. More weight = less mileage. More rubber on the road also = more rolling resistance etc etc.
Either it makes the vehicle too much fun to lay into the gas or it adds too much weight.
Besides, you're modding the car to look/drive better right? if you worried about fuel eco, you wouldnt put the money into parts (thats more money you could spend on gas).
Do the mods because you want to do the mods and just accept that you will take a hit somewhere else.
The general answer is that More rubber on the road = more weight. More weight = less mileage. More rubber on the road also = more rolling resistance etc etc.
Last edited by bulwaagh; Sep 8, 2009 at 08:09 PM.
Super Member
Joined: Jan 2008
Posts: 1,631
From: Grand Rapids, Michigan
I dunno, but for every 1" of extra height on the tires of my full-sized truck, its about 10-15% hit in fuel economy. The real answer is, if fuel economy is what you are looking for, don't do performance mods.
Either it makes the vehicle too much fun to lay into the gas or it adds too much weight.
Besides, you're modding the car to look/drive better right? if you worried about fuel eco, you wouldnt put the money into parts (thats more money you could spend on gas).
Do the mods because you want to do the mods and just accept that you will take a hit somewhere else.
The general answer is that More rubber on the road = more weight. More weight = less mileage. More rubber on the road also = more rolling resistance etc etc.
Either it makes the vehicle too much fun to lay into the gas or it adds too much weight.
Besides, you're modding the car to look/drive better right? if you worried about fuel eco, you wouldnt put the money into parts (thats more money you could spend on gas).
Do the mods because you want to do the mods and just accept that you will take a hit somewhere else.
The general answer is that More rubber on the road = more weight. More weight = less mileage. More rubber on the road also = more rolling resistance etc etc.
Joined: Nov 2008
Posts: 4
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