MPG penalty with wide tires
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Diesel Enthusiast
Joined: Dec 2009
Posts: 130
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MPG penalty with wide tires
Could some with first hand experience comment on fuel economy loss when switching from the stock 235/85/16 tires to a wider tire such as a 285/75/16 assuming both tires have highway tread? I'm actually thinking about going the other way around and want to know if it would be worth it to install a narrower tire.
Diesel Enthusiast
Joined: Feb 2011
Posts: 169
Likes: 4
From: Idaho
tall narrow tires if you want milage and power. I run 265 75 16 and like them looks good enough for now and cruises pretty good. I want to go to 35s but need to lift the front and some other stuff.
Diesel Enthusiast
Joined: Mar 2010
Posts: 139
Likes: 4
From: Powell Butte, Oregon
I have 33 11.5 16 nitto mud grapplers with deep offset wheels 10 inches wide and i average 16-22mpgs. Narrower tires actually do alot better than wide tires anyway in mud and snow
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also depends on gearing, if its low geared itll run a taller tire better with less effort than if its high geared running a tall heavy tire.
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also depends on gearing, if its low geared itll run a taller tire better with less effort than if its high geared running a tall heavy tire.
Last edited by 1stGen1990; Nov 11, 2011 at 12:23 AM. Reason: Automerged Doublepost
Diesel Fan
Joined: Jan 2011
Posts: 29
Likes: 3
From: Crandall, TX
yeea im bout to change my tires form the standered to a 235/70 R16 ill let you knw how it goes here in a week or so
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oh wait never mind you got 285 my bad miss read
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oh wait never mind you got 285 my bad miss read
Last edited by sotomo; Nov 28, 2011 at 04:36 PM. Reason: Automerged Doublepost
Diesel Fan
Joined: May 2010
Posts: 35
Likes: 0
From: Pojoaque N.M.
in the last year i have ran 315/70/17..255/85/16... and now 265/70 17..
with 3.55's mileage was not much diferent between.
if the 265's where not free I wouldnt be running the I HATE THE SMALL TIRES..
speedo is now 10% off
with 3.55's mileage was not much diferent between.
if the 265's where not free I wouldnt be running the I HATE THE SMALL TIRES..
speedo is now 10% off
Diesel Bomber
Joined: Aug 2009
Posts: 2,257
Likes: 186
From: CO
generally speaking, bigger tires (either in width or diameter) will always yield poorer fuel mileage, with the exception of slightly taller tires in a purely or nearly purely all highway-driven truck. The diesels have enough torque you won't notice it much within an inch or 2 change one way or the other. Gassers will quickly become real pigs on any size tire increase. The big MPG hit on the Ram diesels comes when you get up over around 35" or so.
Diesel Bomber
Joined: Jul 2009
Posts: 1,861
Likes: 86
From: Kingwood, WV
I'll be making a 900+ mile trip dec 22nd-23rd pulling a tandem axle uhaul. I've got 305/75's mounted on 20x12" rims.... I'll let you know what my mileage is like.
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