Stock 265/70/17 "smoothy" michilens went to toyo/at 285/70/17 lost 1mpg. More agressive tread and more tire mass I wasn't surprised and expected as much. Any time I see someone talking about bigger tires I always assume that means more aggressive tread pattern. And it never fails always AT's or Mt treads without fail. Never seen any 305's or 315's with smooth tread like stock Now maybe just maybe a smoothy 285 with the better rpms would help but I didnt get the tires for that I got them for traction like everyone else.

 

did the taller tires have a more aggresive tread? only if you used the same model of tire, can you say that the 1 mpg difference came from the tires being taller. see if your mileage stays the same if you go from the stock michelins to super swampers in the same stock size- get my point?

 

yup- it's more than just the size of the tires that will account for mileage change.

 

Just about any tire will have a bit more agressive tread than the stockers. Mud tires will have the most rolling resistance. ProComp a/ts roll pretty easy.

 

in my case i believe it had more to do w/ going from a 31.5" to a 35" tire. the tread pattern on the grapplers isnt as bad as it looks, definately nowhere near a ss or bfg mt or pro comp mt. when i installed these tires i could imediately feel the size/weight difference from a stop. there just too **** big for my 3.73's and 48re.

i have a question, my tires are 325/65/18 and measure 35"x13". the tires i now want to get are also grapplers but in a 325/60/18 and measure 33"x12.8 can someone tell me why the 60 series measure 2" smaller than the 65 series? also the 305's i was planning to get for my stock 17" wheels are actually 34" tall, im glad i didnt get those.

 

The series numer is the aespect ratio. Lower numbers are shorter ever with the same width. A 305x60 will be shorter that a 305x65.

Derek <*)))><

 

I saw a similar drop when I went from stock to 305 65 18 BFG AT's. I was getting around 15 stock and now I can't seem to get better than 13.5 (hand calculated). As a side not I have the PSI at 60.

 

I wish someone would make a 33/9.50/17 and 35/9.50/17 . I like um tall and skinny .

 

If diesel keeps rising,demand for just such a tire should increase.

 

ghost- how many miles are yuou getting per tank?

 

Yeah, seemed like I lost about a mile per gallon.

Read sig.

 

there are some super swampers that are like 34x10.50x17. i've seen some drw's running them and they look very cool.

 

my first tank w/ the 35"s i got a total of 320 miles and it took 26.5 gal. to fill it up. that equals just shy of 12.1 mpg

with the stock tires i used to get around 100 miles more than that w/ the same mixure of city hwy driving. usually between 14-16 mpg.

the only time i ever got mpg down in the 12's was when i towed my work trailer everyday spring through fall (all city towing).

 

It seems to me the folks with the autos are the ones that are loosing the mpgs for the most part, while the guys with the G56 and the steep OD are either getting the same mpg or slightly better.

 

285/75/18 TOYO A/T
Its 34.9" tall and I think 11" wide and "E" rated
I went from stock to 325/65/18 toyos and hated them! Just to big! To wide!
Bad mileage, bad handling etc. etc.

Now I love the way it looks, rides, and tows.