Limited Aftermarket Tire Sizing

[luderiffic]

Hello! I am pulling out XREAS, ditching the stock wheels and putting in a Toytec Boss lift with 17" tires (Rims chosen are 17"x9"). The installer recommended 285's but I am worried about the mpg hit I will take. I have seen some others put 265's with Spidertrax spacers but a little weary of the additional maintenance that goes along with those. I also thought about 275's but the Falken Wildpeaks in the load range I want don't come in that size.

I calculated a 2 mpg hit on fuel economy, based on size difference between the 265 vs 285...is this reasonable? With my current driving and current fuel prices, that's almost ~$240 per year.

This will likely be a pavement queen, I hardly ever go off road.

Thoughts?

 

[4runr4eva]

This...

http://www.toyota-4runner.org/5th-g...r-5th-gen-tire-fitment-guide.html#post1550444

 

[IanB]

I calculated a 2 mpg hit on fuel economy, based on size difference between the 265 vs 285...is this reasonable? With my current driving and current fuel prices, that's almost ~$240 per year.

This will likely be a pavement queen, I hardly ever go off road.

Thoughts?

Curious how you calculated a MPG change on paper, what is this based on?

 

[luderiffic]

I remember seeing some posts about Limited trim only getting 15-16mpg with 285's. I only get 19 now with 245, so I just implied I'd take a 2mpg hit with 265's and 4 with 285's.

This is why I asked the question if it was unrealistic. Thanks!

 

[tm965]

I remember seeing some posts about Limited trim only getting 15-16mpg with 285's. I only get 19 now with 245, so I just implied I'd take a 2mpg hit with 265's and 4 with 285's.

This is why I asked the question if it was unrealistic. Thanks!

my average only dropped .5-1mpg when switch from 20s to 17s w/ 265s then 285s. havent seen a hit when switching from 265 to 285. 16.5 mpg avg, mostly traffic. occasional highway.

 

[MrGainzz]

Don’t do 285 if your truck is a pavement queen. The mpg drop is real and the truck will become significantly more sluggish especially on a Ltd that’s equipped with full time 4wd.
Do 255/75/17 instead,it performs better on roads.


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[matoolie]

I'm getting an average of about 14 mpg with 285's. 95% city driving, but also have other mods with additional weight. See my sig. Also note your truck will kick out of overdrive a lot more on the highway on shorter/smaller inclines at 70+mph than with OEM tire size.

 

[Snoranger]

I've got 265/70R18 on Falken Wildpeak AT/3 (E load rating). I'm getting just shy of 17 mpg, and most of my driving is county roads and freeway driving.

 

[Millski]

Don’t do 285 if your truck is a pavement queen. The mpg drop is real and the truck will become significantly more sluggish especially on a Ltd that’s equipped with full time 4wd.
Do 255/75/17 instead,it performs better on roads.


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2nd this ^^

 

[luderiffic]

I've got 265/70R18 on Falken Wildpeak AT/3 (E load rating). I'm getting just shy of 17 mpg, and most of my driving is county roads and freeway driving.

Do you have a pic of your setup? What type of rims do you have?

This guy's setup really intrigued me, but haven't seen it on a Limited. He put spacers on his 265's to push the wheels out. Not sure if that will be needed but I really like the look of the wheels flush. From what I have read, the offset affects how far the rim gets pushed out.

http://www.toyota-4runner.org/5th-gen-t4rs/255678-lifts-265-70-17-issues-3.html

 

[Orbital Debris]

I have a similar story: 2013 Limited, removed XREAS, added 3 inch Toytec lift, switched to 265/70/17 Cooper AT3's on OEM trail rims.
As with the poster above, I would estimate 0.5 to 1 mpg decrease. Current avg mpg is 18.1 mpg.

I second some of the others - I would not install the 285's on a pavement queen if you are the least bit concerned about mpg.

 

[Snoranger]

Do you have a pic of your setup? What type of rims do you have?

Falken Wildpeak A/T3W (265/70/R18) on FN BFD Matte Black wheels

 

[TRD PANTHER]

OP, Snoranger’s limited 4Runner tire size works out to be 32.61” tall with a 265(10.43”) width. This narrow, tall tire provides better rolling resistance, but, due to the height reduces torque and will feel more sluggish and reduce mpg. A 285-70-17 looks great and works out to be a 32.71” tall tire with an 11.22” width, but, will be worse on mileage and power by about 1.5-2mpg over a 265-70-17. I run a 275-70-17, (32.16” x 10.83” width), and IMO, think it is a perfect overall size for looks, mpg, power, etc. Speedometer/odometer is only off 1.8% over my factory equipped 265-70-17 (31.61” tall x 10.43” width). Not worth recalibration in my case. You can also still fit a 275-70-17 under the truck in the spare tire location as opposed to a 285-70-17. Pic of my 4Runner with 275-70-17. Stock TRD Pro height, which, is 1” taller than other factory 4Runner suspensions. Tire sizes will vary slightly from different manufacturers. Good luck with your decision.

 

[Jhalko]

Choose your priority, the look of larger tires or slightly better MPG. Oh and with a 17x9 rim and 285’s be prepared for rubbing, and if you put wheel spacers on it’s almost guaranteed.

I was fine with 265’s with my setup, going to 285’s hasn’t made much difference in mileage or drive ability into the mtns.