Rollin on 37"s w/o a lift
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Joined: May 2006
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From: Florida
Lol 
I don't even have enough miles on my truck to provide any real documented results. The results I based that statement on were hand calculated for a couple tanks. There is one thing for sure though, I know the difference between my mileage going up and down...and it definitely went down the day I had these tires installed.
I don't even have enough miles on my truck to provide any real documented results. The results I based that statement on were hand calculated for a couple tanks. There is one thing for sure though, I know the difference between my mileage going up and down...and it definitely went down the day I had these tires installed.
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I must have a magic truck also!
Think about it this way, putting 37's on an a truck with 4:10's is almost like changing the gears to 3:73's. With the 37's at 70mph I'm taching 300 rpm's lower then with stock size tires. Less RPM's = better mileage
Think about it this way, putting 37's on an a truck with 4:10's is almost like changing the gears to 3:73's. With the 37's at 70mph I'm taching 300 rpm's lower then with stock size tires. Less RPM's = better mileage
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Joined: Aug 2006
Posts: 648
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From: San Antonio, TX
Sorry I wasn't clear I thought that everyone here agreed that going with a wider and taller tire killed your MPG's, especially with an AUTO. Seems like what has already been said here about the manuals might be true that the taller tire helps a little.
Believe me I wish a taller tire would help the auto on the highway I spend most of my driving at 70-75 and I would love it if a 35" would give me 1-2 more MPG's but from all the posts have read on here that just doesn't seem to be the case. I am happy for you though.
BTW XLR8R, truck looks good and nice to see you made it work for your situation. Seems like sometimes we get in a rut of what is the best setup when in reality we all have different circumstances if your not rock crawling then your setup may work really well.
D. Wiggs, personaly I think your setup should yield the best results in the MPG department. Your tires are much taller than stock but not much wider giving a high powered truck like yours the proper gearing.
I wish there were more tall/narrow options for SRW trucks.
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Joined: May 2006
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From: Pittsburgh, Pa. & Columbus, OH.
Yes, I definitely have much less rolling resistance than a 13.5 or 15.5" wide tire! I will be curious to see what the 295s do.
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From: VA
Thread Starter
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From: Pattonville, Texas
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Thread Starter
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Joined: Nov 2005
Posts: 7,785
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From: Pattonville, Texas
Thanks!
Your truck actually gave me the initial ray of inspiration to attempt 37"s w/o a lift...
I don't remember which wheels they are - might be American Racing, but I know they had a bit more backspacing than the OEMs. I'm thinking of buying another set of alloys with more backspacing for the 37"s, and running the current alloys on my '98... I still have the original alloys and want to run the "slicks" on either truck when needed, so I could use another set of wheels anyhow.
It drives great on the highway; I just had to get used to the increased responsiveness of the steering wheel (and of course the ability to go 120mph).
Your truck actually gave me the initial ray of inspiration to attempt 37"s w/o a lift...
I don't remember which wheels they are - might be American Racing, but I know they had a bit more backspacing than the OEMs. I'm thinking of buying another set of alloys with more backspacing for the 37"s, and running the current alloys on my '98... I still have the original alloys and want to run the "slicks" on either truck when needed, so I could use another set of wheels anyhow.
It drives great on the highway; I just had to get used to the increased responsiveness of the steering wheel (and of course the ability to go 120mph).