tire size vs mpg/performance
#1
tire size vs mpg/performance
hey all, i'm looking at some new wheels and tires and need a bit of advice. im looking to go with 20s on 35"x12.5" Grapplers with a 5-6" lift, but also like the look of 22s on 38" or 40" Grapplers (with an additional 3" body lift). i have an '07 4.7L QC 2WD and will be travelling about 700-800 miles a month (about 90% of this being highway miles). I'll also be wrapping my truck to promote my business and make better use of the attention it will be getting. But my question is regarding the performance and MPGs of my truck with the 38s or 40s. First, can my truck even handle these size tires without being a 4x4 or having the 5.7L? I dont want to put major strain on my motor or tranny. Second, is there a huge drop in MPG between 20s on 35s and 22s on 40s (or 38s)? thanks
#3
hey all, i'm looking at some new wheels and tires and need a bit of advice. im looking to go with 20s on 35"x12.5" Grapplers with a 5-6" lift, but also like the look of 22s on 38" or 40" Grapplers (with an additional 3" body lift). i have an '07 4.7L QC 2WD and will be travelling about 700-800 miles a month (about 90% of this being highway miles). I'll also be wrapping my truck to promote my business and make better use of the attention it will be getting. But my question is regarding the performance and MPGs of my truck with the 38s or 40s. First, can my truck even handle these size tires without being a 4x4 or having the 5.7L? I dont want to put major strain on my motor or tranny. Second, is there a huge drop in MPG between 20s on 35s and 22s on 40s (or 38s)? thanks
#4
#5
well thats why i was asking i like the 35s, but have seen alot of really nice trucks on 37s, 38s, and 40s. tho i have no idea whats involved in running with those sizes other than lifting for tire clearance. thats why i come to you guys for advice being that i'll need alot more than an additional body lift to run those sizes, i'll stick with the 20s & 35s. the last thing i want to do is over-tax my ride
#6
Taller tires turn slower which makes it act like there is less gear in the rearend which keeps the highway rpm lower.
The stock 275/60R20 tires are about 33" tall. I wouldn't go any larger than 35" and that will probably require a 2" leveling kit for the front. Larger than that and you will be replacing front end parts alot!!
The stock 275/60R20 tires are about 33" tall. I wouldn't go any larger than 35" and that will probably require a 2" leveling kit for the front. Larger than that and you will be replacing front end parts alot!!
#7
Trending Topics
#8
i'll stick with the 35s then since i really dont have time to deal with repair headaches. these other guys running 38s and 40s must either hardly drive their trucks or have alot of time and money to devote to them. thanks for the heads up
#9
no more of a benefit for my truck than 35s i guess. like everyone else that does it i just like the way they look, but not enough to hurt the ride. i got a 2WD for better MPG on the highway, but i dont like the truck looking like every other Ram either.
Last edited by xill; 05-24-2009 at 10:46 PM.
#10