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Thread: 16 or 18in wheels?
06-09-2013, 08:40 AM #1
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16 or 18in wheels?
I current have the stock (265/70/16) wheels & tires,,,I have an option to purchase 2013 18in wheels & tires..My question is how much will these effect my mpg and response?
Last edited by Necred; 06-09-2013 at 06:02 PM.Beige 03 2500 4x4 4dr xcab auto
06-09-2013, 09:03 AM #2
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I the new wheels are heavier than your old ones the unsprung weight will affect things some, whats the overall size of the tires your using because that'll make a difference too.
06-09-2013, 05:05 PM #3
You will probably see a bigger difference in gas mileage from tire size than wheel diameter. When I upgraded mine from 16s to 17s I really did not see much of a difference, I also went with stock tire dimensions.
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06-09-2013, 05:15 PM #4
17", 18" and 20" wheel and tires were available for my truck (an '09) when I compared each tire I was surprised to find the circumference of each tire was almost the same. So close, that I'm sure there would be no difference in speedo readings, or mpg.
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06-09-2013, 06:25 PM #5
a 32" tire that is 10" wide will have the same mpg, response, etc., whether its on a 15" wheel, 16" wheel, 24" wheel" 30" wheel....
does not matter wheel size. its all about outside tire size and width.
and as far as weight, if your going up in wheel size, weight will increase obviously, but tire weight will also decrease hand-in-hand.
the marginal difference in weight, IF its even any heavier, will yield NO effect on your parameters. Since your tires are in contact with the ground, an additional 10 pounds in weight on one tire and wheel (40 pounds for all four), is the exact same as 40 pounds sitting in the bed of your truck. and if 40 pounds affects your mpg, I feel sorry if you ever carry any passengers in your truck LOL2000 Chevrolet Silverado
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06-09-2013, 06:28 PM #6
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The chart shows 265/70/16 tire (on truck now)is 30.61 dia. the stock tire on 2013 was almost 2 in taller (I don't recall the size) as I put the 2 tires side by side after making sure they would clear fender well. I cant reach owner of truck to ask the tire size but im sure it was 2in taller. So the weight will affect the mpg & response more than the size?
The stock tire on 00 Z71 is the 265/75/16 (31.65),, I may just put them on it. my mpg now is 18.6 mostly hiway...
06-09-2013, 06:37 PM #7
06-09-2013, 08:20 PM #8
To the OP, if the wheels/tires coming off are OEM, for your truck; and, the wheels/tires you are looking at, are OEM, for your truck, you will notice very little difference in mpg, and/or, performance. GM selects the tires based upon mpg, performance and most of all, road noise.
06-09-2013, 08:56 PM #9
As I have mentioned in other posts, they changed the bolt pattern from a SAE to metric in 2011 for the 2500s...did they follow suite with the 1500s? Might be worth checking before buying...
06-10-2013, 12:56 PM #10
Another thing that happens is that when the speedometer is off, it throws off automatic transmission shift points, so your fuel economy will suffer.
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