which tire size?

ive messaged a lot of you asking this questions, but i figured id make it public. ive searched a lot but still wanted to post this. im going to have to start driving my truck to work, 56 miles one way with rough country roads, and i need a more dependable truck so im taking off the lift and tires and returning it to stock. im stuck between 265/65/17 stock tire size for max mpg or the better looking 265/70/17. many seem to run with the larger, and ive heard they experience a small mpg loss and some say they lost a lot.

im getting the revo 2's, the 265/65's weigh 41lbs and the 265/70's weigh 42 but are cheaper. also, i have heard that with the stock tires our speedos are off and getting the 265/70's have corrected that issue. i do not know this for my case because i never tested that.

Pros of 265/65/17: max mpg, don't have to worry about odometer being off or formulas to get the exact mpg

Cons of 265/65/17: looks small, more expensive

Pros of 265/70/17: cheaper, looks better, more selection

Cons of 265/70/17: loss of mpg, speed/odometer being off

sorry if im beating a dead horse here, just kinda wanting to get some input

 

I'd get bigger tires, but that's me.
I had 265/65-17 and then upgraded to FJ wheels and went to a 265/75-16

 

how has your mpg/acceleration been since you switched to the bigger tire? i know this is a truck and it shouldnt get "hybrid-like" mpg but if im gonna be losing 1-3 mpg that can add up after just a few tanks. also, hows your speedo/odometer been since then

 

I have the 265/70-17 on my truck right now and to me they feel heavy and I lost a mile per gallon. I'm considering returning them for stock size. I'll be watching this thread to see what others are saying...

 

yeah i mean usually 1 mpg is not that bad, and the truck looks better with the 265/70's but if im driving about 112 miles a day for 14 days a month, that 1 mpg loss can add up. but ive also read that some havent lost hardly at all. its probably going to be a different story per person

 

X2 Your gas mileage shouldn't change that much...You might notice a lil but not enough to cry about

 

haha yeah, anything can be better than what im getting now with 285/70's!

 

Why are you changing from what you have right now? Your truck looks sick! Is the milage that much worse?

 

note that if you get the bigger tires you will also hav larger tire circumference.that will give you longer distance traveled compared to your stock tire.imo i wont worry too much on mpg.the differnce between the 2 tire sizes is 1 inch on the circumference.bigger tire,longer travel.weight is 1 lbs. heavier but looks will compensate.

 

Whatever you do, do not get Sumitomo All Terrains from Tire Kingdom. They took three times to balance them and then the tires rode terrible. I just went and got stock size Rugged Trails put on the truck and it feels like a completely different truck.

Long story short.... I recommend stock size tires that ride smooth like the BFG's after a week of riding on heavy cheaper tires!

 

my truck is going to be more of a daily driver now, and i dont like the ride especially when its 56 miles one way to work. and i could use an extra couple mpg's too.

 

My new BFG's are just the 265/65-17. The Sumitomos I had weighed about 6 pounds more. Not a big difference but I could tell when I hit a bump it was a lot more harsh and shook the truck more. Probably in my head mostly and some because of the all terrain aspect of the tire. But, I do have to say the Rugged Trails suit my driving a lot better. Smooth and quiet. I could feel the extra weight every time I turned the wheel with the 265/70-17 Sumitomo. Like I said, may have been a preconcieved notion.

 

i think the bfg a/t's in 265/65/17 are load range e correct? if so thats a pretty heavy tire. the revo's im lookin at weigh 41-42 pounds so not too far off from stock weight of 36 pounds

 

I think the BFG Rugged Trails I got are about 35 lbs. each. The Sumitomo All Terrains I had said 41 lbs. online. I'm much happier with the Rugged Trails I have now.

 

I think you need to quit being a Bitch and leave it alone. The MPG difference cant be that much. Im running the pretty much the same setup. And I just think you will really regret going back to stock.

 

Unless there other factors involved, a larger tire size should result in increased MPG.

Consider the 265/65/17s: Let's presume that you travel at a GPS measured rate of 50 mph at an engine rpm of 2200. In one hour, you travel a GPS measured 50 miles. Your odometer reads (presumed) that you traveled 50 miles.

Now 265/70/17s: Same measured distance of 50 miles and same set time of one hour. To travel at a GPS rate of 50 mph with the larger tires, you need to decrease engine rpm by approximately 3.4 %, to 2125 rpm, (presuming the rpm/rate as linear) as the larger tires are 3.4 % larger in circumference. You still arrive at your destination in one hour, but you have traveled that distance at a lower rpm, and your odometer will show the miles traveled as 48.4 miles.

Your engine has been running for one hour in either case. With smaller tires it has been running at 2200 rpm for one hour - with the larger tires it has been running at only 2125 rpm for one hour. Which will use less gas?

I believe the fallacy of decreased mpg when running larger tires is the tendency to 1) Calculate mpg's while running at the same speedometer measured speeds as previously run with the smaller tires, 2) Not taking into consideration the decrease in mpg due to the more aggressive tread of many “oversize” tires, and 3) Neglecting to account for the increased height and subsequent wind resistance of lifted trucks that often accompanies larger tires.

With the larger tires, if you travel the same measured 50 miles at your normal speedometer reading of 50 mph, you will arrived in 58 minutes, rather than the 60 minutes that it would have taken with the smaller tires. Your odometer indicates that you traveled 48.4 miles, when you actually traveled a measured 50 miles, the same measured distance traveled with the smaller tires. If your GPS speed was 50 mph with the smaller tires at a speedometer reading of 50 mph, your GPS speed with the larger tires at a speedometer speed of 50 mph is actually 51.7 mph. (Note: It is likely that the 3.4 % larger tires will provide the more accurate reading)

Equivalent speedometer readings with the larger tires will result in higher actual rates of travel and longer distances traveled in a given period of time as compared to that experienced with smaller tires. Higher speed generally equals lower mpg.

Absent other factors such as power curves, rolling resistance, wind resistance, etc., traveling a measured distance in a set period of time should show that larger tires provide better gas mileage, not poorer. The difference is nominal in any case.

If you have a choice of tires that are identical in tread and load-rating, there’s no reason why you shouldn’t choose the larger tire if gas mileage is your only concern. The fact that the larger tires are less expensive makes it an easy choice.

 

So are you saying, if I put 40" tires on my Tacoma, I'll get better fuel mileage?

 

If you didn't regear, or tip over , it is a fact.

 

lmao thanks for your honesty. i probably will regret taking the lift off. but since im going to be driving it to work more often (55 miles one way) i want a little better ride. with all the vibes and rough riding i have it gets old when driving it for 2.5 hours a day. i could use better mpg any day of course.

i have considered one option, i want the best ride possible if i keep this lift. so id prob get some c/o's and a dakar leaf pack. downsize to 265/70/17 revo 2's with my stock wheels painted black. this way im going to get a little better mpg, much softer ride with quality parts. though im still going to have vibes/shudders which will suck. plus there comes replacing parts due to the lift eventually

 

What about the additional weight of a 40" tire? Even if you didn't tip over, that's a lot more weight to move around.