[ilovetacos]

I am going with BFG AT's but undecided on size. I will be sticking with the stock 17" Sport wheels and know I will be needing a 1/4" spacer with the 285/70's. My questions are what will be the difference in gas mileage as I commute almost 40 miles roundtrip? I am averaging about 18 mpg now with the stock Dunlops. I know I will get better gas mileage with the 265/70's but how much? Any input would be appreciated.

 

[Pb]

You could compromise, and get a 275, like I did. Do BFG ATs come in a 275/70 ?

 

[ilovetacos]

I was thinking about that but the BFG's don't come in that size. I searched and the only tire I found in the 275/70's are the Goodyears you're running. Have you found anyother tire in that size?


edit: Just found that Cooper ST's come in that size. Don't know too much about those though.

 

[screeber]

BFG makes a 275/70/16, but I don't think they do the 17". From what I've seen locally, the 275/70/16's are more expensive than the 285/75/16 because they don't do the sales volume in that "tweener" size.

 

[ilovetacos]

Just found Goodyear MTR's in 275/70-17 for $599/set...Will I need spacers with the stock 17" sport wheels?

 

[Pb]

Without a spacer they will probably rub on the UCA. There was a thread here somewhere about running 285s on stock wheels. They rubbed on the UCA while turning.

 

[ilovetacos]

Without a spacer they will probably rub on the UCA. There was a thread here somewhere about running 285s on stock wheels. They rubbed on the UCA while turning.

Yes the 285's will require a 1/4" spacer but will the 275/70's? What kind of gas mileage are you getting with your 275's?

 

[Pb]

They have hurt my MPG a little. I'm not sure exactly how much. Maybe 1 or 2 MPG less. The Wranglers have a lot more tread than the stock Dueler street tires, so they weigh a lot more. They felt at least 10lbs heavier than the stock tires. But that's impossible to avoid when you get a tire with thick tread. Lots more rubber.

 

[Pb]

Just get some 275s and try em without the spacer. If you get Wrangler SA's, they have a 30 day return policy, if bought through a GoodYear dealer. If you don't like them you can return them.

 

[trruuck]

I have Goodyear Wrangler MT's 275/70R17 on my Tac which has the 3" lift. Very minor rubbing on the back of wheel well, but a little trimming and now I have no more rubbing. I love how tall the tire looks, but I think next time I am gonna get the 285/65R17 and trim a little extra so the width of the tire looks better.

 

[Adventure North]

They have hurt my MPG a little. I'm not sure exactly how much. Maybe 1 or 2 MPG less. The Wranglers have a lot more tread than the stock Dueler street tires, so they weigh a lot more. They felt at least 10lbs heavier than the stock tires. But that's impossible to avoid when you get a tire with thick tread. Lots more rubber.

It's not only the added rubber it's the whole build of the tire. Going from a passanger rated tire to a "C", "D" or even "E" rated LT tire means more ridgid construction, with stronger side walls, more internal plies, and in many cases that means the addition of steel and polyester belts. The sad thing is many times OE P-metric tires are not even rated to meet the OE gross vehicle weight ratings, dumb really.

 

[LQQKatmy06]

I just put 265/70/17 Nitto A/T on my 06 DC and have no rubbing issues and that's on a 9" wide aftermarket wheel with 5.5" backspace. You'll be surprised how much bigger a 70 looks over the stock 65 that came on our trucks. Have not checked gas mileage yet, See link for pics.

 

[TrdTacoma84]

Im running 265/70R17 on my tacoma Copper stt's and the first 6 months they were giving me great MPG same as stock. But now im getting really poor gas mileage, not sure if its beacuse the cold weather or the tires. I went from getting 18mpg 6 months ago to 16mpg now. :whatthe:

 

[Deekman]

I have 265/70/17's BFG AT's on my 06 TRD sport, no rubbing, they look awesome, small mpg loss, pain in the ass to balance

 

[Adventure North]

Im running 265/70R17 on my tacoma Copper stt's and the first 6 months they were giving me great MPG same as stock. But now im getting really poor gas mileage, not sure if its beacuse the cold weather or the tires. I went from getting 18mpg 6 months ago to 16mpg now. :whatthe:

Cold weather is a mileage killer. It's most likely the colder weather. My mileage really takes a dip in the winter. I bet once the warmer weather rolls around your mileage will go back up.

 

[LQQKatmy06]

Im running 265/70R17 on my tacoma Copper stt's and the first 6 months they were giving me great MPG same as stock. But now im getting really poor gas mileage, not sure if its beacuse the cold weather or the tires. I went from getting 18mpg 6 months ago to 16mpg now. :whatthe:

Whats your backspace on your Helos? Have you ever tried a 275 on your wheels?

 

[TrdTacoma84]

Cold weather is a mileage killer. It's most likely the colder weather. My mileage really takes a dip in the winter. I bet once the warmer weather rolls around your mileage will go back up.

I really hope so. Its werid beacuse my 4runner is avg 19mpg. :dunno: whats going on.

 

[TrdTacoma84]

Whats your backspace on your Helos? Have you ever tried a 275 on your wheels?

How can i find the backspacing? On sites they list variety of them im going to guess 12mm Offset and 4 1/2" Backspace not sure though.

And i wanted to get some 275's but the only mudd terrain tires available was the good year one. which was really expensive.

 

[LQQKatmy06]

How can i find the backspacing? On sites they list variety of them im going to guess 12mm Offset and 4 1/2" Backspace not sure though.

And i wanted to get some 275's but the only mudd terrain tires available was the good year one. which was really expensive.

Toyo and Yokohame offer 275s in 17"

 

[10SE]

Right away, I lost roughly 2 mpg on the highway with the 285's. Now, I've learned that simply by slowing down about 5 mph, I can gain back almost half of that (when it's not really windy).

My stock, cold-weather, highway mileage was about 17.7 mpg with the cruise set at 77 mph. Now, lifted and with the 285's, I've settled in at about 16.2-16.5 mpg with the cruise set at 72 mph (corrected for tire size).

100-mile commute, five days per week for me.