265/70/16 or 265/75/16?

Putting M/S2s on. 95% highway driving. Will I loose too much mpg by going up to the 75s?

I have a '10 SBDC TRD Off-Road 4x4.

Thanks guys!

 

Most (but not all) 265/75/16's are E load range, which are heavier - so that and the larger diameter will adversely affect your gas mileage. My BFG AT KO's cost me at least 1 mpg on the freeway over the stock 265/70/16 Rugged Fails.

 

I have 265-75-16 but not in load E, and I love them. Cooper ATPs

 

There's no need for an E load-rated tire on a Tacoma. Those tires are for 3/4 and 1 ton pickups

 

Nope...

It is a size that fits on the Tacoma without any lift and without any rub.

It adds 1/2" of ground clearance being about a 1" taller tire (32" vs. 31").

I get them in P metric and (no E load rating) which is the same as the BFG Rugged Trail TA that comes on our Off Road Tacomas.

Hankook Dynapro ATM and Destiny Dakota AT are the two 265/75-16 makes I have run on my 2010 after the Rugged Fails failed me the last time (at 20,000 miles).

On my 2005, I ran Toyo Open Country AT and Cooper Discoverer ATR and liked them both. I did run a heavy, 3 ply sidewall Cooper Discoverer STT and did not like it... noisy on the highway, terrible in sand.

 

LT 265/75/16 6-ply C load rating FTW.

 

Note that your odometer is turning slower with the taller tires. For every 40 miles I drive using highway mile posts, my odo says I went only 39.0 miles. If you fill up at 200 miles, figure your gallons used at 205 miles for true MPG calculating.

The speedometer is right on with the 265/75-16 tires, because Toyota made it read a bit fast, on purpose, with the stock tires. The odometer was accurate, but slowed down with a taller tire.

 

I thought it was weird back when I was stock and I'd get passed by semis and look down at my speedometer and see the needle at 60 or 65 mph.

 

Wait, don't the speedometer and odometer run off the same cable out the back of the tranny?

 

My speedo reads the same now as it did with the 245s, my gps says 65 when my speedo does also done it with my phone and it's the same

 

That was my old argument here. But, I kept getting told that the speedometer gear is a bit different than the odometer, so that Toyota won't get blamed for you getting a speeding ticket. At 65 real mph, your speedometer on stock tires says 67-68 (ie. if you drive at 65 on your speedometer, you are actually going about 63 mph and truckers are looking down at you).

Put on 265/75-16 and the speedometer and GPS speed are matched! 65 = 65!

However, now your once accurate odometer is running a bit slower, and that makes you look like you are getting 1/2 mpg less than before.

Drive 200 miles on your odometer and fill up, but you really traveled 205 miles. 12 gallons burned without the correction is 16.7 mpg. With the correction is 17.1 mpg.

 

I don'r know what you have on now, but there isn't any magic happening. If you put a taller tire on other than what is stock, everything slows down (speedometer and odometer) than what it read off the showroom floor. The taller tire turns less, so it will read less miles.

Stock speedometer reads fast on purpose from Toyota, if you checked it with a GPS then. I did on both my second gen trucks, and both were the same.

Put a slightly taller tire on, and get a slightly slower reading... in our case, an accurate speedometer reading using 265/75-16 over the 265/70-16, and a slightly slower odometer reading.

 

I have my coopers on
I know the math behind it and I know there isn't any magic I just know it's negligible difference 1-2 mph different isn't a big deal, now run a 35 then there is something to think about

 

265/75/16 with Duratrac Load range C tires here. No major MPG change but the truck does shift at different points than stock. Not bad- Go for it!

 

Nah, you'll also correct the speedometer issue by putting bigger tires. It's off a little when it comes out from the factory.

I saw an increase but it's not that noticeable. Well I did put a 3'' lift, so I guess that didn't help.

Fuel consumption (city) when I got it off the dealership (brand new) : 16 MPG

Fuel consumption (city) with 32s + 3'' lift : 14.9 MPG

**I am not a heavy foot driver so these numbers will increase if you like to floor it once in a while**

 

I am lucky to get 15 mpg around town/city driving. I am careful with accelerating from stop signs, but it is all the stops and goes that eats the fuel. Non-stop highway driving, even at 75 mph gives me near 20 mpg, unloaded and near 18 mpg with camping load.

 

Installed Michelin ms2s in 265/75/16 and saw no noticeable difference in mpg. The ride however is EXTREMELY better. Those tires are worth the extra $$.

 

Oh yeah mine are load E and again no noticeable increase

 

265/75 is the right size for our trucks

 

I ended up going with 265/70/16s and LOVE them!!!