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Old 08-09-2010, 08:12 PM   #1
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Which gives better Gas Mileage???

So I'm trying to find a definitive answer to a dilemma concerning tires size and gas mileage. Which tire below will give more MPG with normal usage? Does thickness or size have more to do with hurting your gas mileage? Please be specific about this which does what and which affects it more. Most AT tires have much stronger side wall protection than "P" passenger rated tires but does this specifically affect the MPG from the larger weight? Would a p265/75/16 or a LT265/75/16 give better gas mileage? It may only be a small amount but I'm trying to get an answer on this once a for all.
Pic below of the two tires in question.



Goodyear Wrangler DuraTrac LT265/75-16 Tire

P265/75R16 BF Goodrich Rugged Trail

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Old 08-09-2010, 08:35 PM   #2
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weight and size and tread pattern all play a part in your MPG, so the tire that weighs the least, is sized best for your gearing, and has the least aggressive tread will give you the best mpg. that said, you may not notice the difference if the tires are very closely matched. i've from a highway tire to an AT tire to a mud tire(same size, same brand), and never saw a noticeable difference.

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Old 08-09-2010, 08:43 PM   #3
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I'm wondering which hurts it more. Maybe an order like this?

1. Weight
2. Tread Pattern
3. Size
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Old 08-09-2010, 08:45 PM   #4
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I'd say

1. Size
2. Weight
3. Tread Pattern
if not regeared

if regeared then
1. Weight
2. Size
3. Tread Pattern
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Old 08-09-2010, 08:47 PM   #5
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Quote:
Originally Posted by ESP123 View Post
I'm wondering which hurts it more. Maybe an order like this?

1. Weight
2. Tread Pattern
3. Size
try this:

1. size
2. weight
3. tread pattern

there is only so much variation in weight you can have between tires that are the same size, where as the bigger tire you have, the more it weighs.
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Old 08-09-2010, 08:53 PM   #6
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I'm thinking that the size probably hurts it the most but other things like thicker and deeper treads and side wall protection add to it. Recently, I bought 5x new Duratracs and noticed a few days later that they put the Class E rated 80psi set on instead of the Class C rated 50psi set. My gas mileage went down faster than BP's stock! I took it back to them and had them put the C load rating ones on and the MPG went up.

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