[Plow78]

I been researching tires for 2 days. Narrowed down to
Michelin LTX A/T's
BFG AT's

Those who replaced there crap stocker tires with BFG AT TA KO's and went up to 75's (265/75/16's) did you notice or have any LOSS in MPG
:help: thanks

ruled out the REVOS's

 

[eyedoc]

you will lose Mpg's with larger tires than stock....for sure! how much, i don't know.....maybe only 1-2mpg. I think most will be in agreement.

 

[lotust]

yes like eyedoc said. Its beacuse they are heavier too. I wish they made the BFG at ko's in a C rated tire.

 

[TacomaRider]

I went today (2/18/08) and bought the BF Goodrich All Terrains 265/70/17 for my 06 Tacoma TRD Sport 4x4 extended cab. So far have been good. Can't tell anything right now since they are new. Thanks to another poster who got this size for his truck and posted some pics of his truck with them mounted I decided to buy these. Now my tires have some "meat" on them. If anyone could tell me how to post pics I would post some. Can't find anywhere on here on how to post any. Sorry new member here.

 

[kanai]

yes like eyedoc said. Its beacuse they are heavier too. I wish they made the BFG at ko's in a C rated tire.

they do, just not for the 265/75-16's. the 265/70-17's on my truck are c-rated (which are essentially the same dimensions). to the OP, i lost about 1.5 mpg with the bfg's, thats with them on the stock sport rim. no change with my new procomps. out of curiosity, why'd you rule out the revo's?

 

[turfdoc]

If anyone could tell me how to post pics I would post some. Can't find anywhere on here on how to post any. Sorry new member here.

Upload your photo's to Photobucket.com and click the direct link tab, then comeback to TN click on the little photo icon above the text box, paste the addy and Bam, theres your pic.

turfdoc

 

[TacomaRider]

thanks turfdoc. I will try to come back and post some pics of the tires. I appologize, he needs some for a 16 inch wheel. Mine are 17 inch. Sorry about that didn't realize til after i replied.

 

[TacomaRider]

Ok here's some pics. Hope this works.

 

[TacomaRider]

here's one more sorry it's big.

 

[2 tacomas]

When I had my 2004 Tacoma, I replaced the stock 265/70/16 BFG Rugged Trails with 265/75/16 BFG All Terrains and my mileage dropped by about 2 MPG; there was also a noticeable loss in power (acceleration). The 265/75/16 AT's are a much heavier tire.

 

[Plow78]

out of curiosity, why'd you rule out the revo's?

I read many post on tire rack and I was discouraged by the amount of people who says they were dissapointed with the wear life.

 

[Plow78]

to the OP, i lost about 1.5 mpg with the bfg's, quote]


:disappoin I was hoping not to lose that much in the mpg:ugh3:
what to do, what 2 do

 

[juddemt]

i have a stupid question. did everybody get their speedo and odometer recalibrated for the larger size before calculating mpgs?

 

[2 tacomas]

to the OP, i lost about 1.5 mpg with the bfg's, quote]


:disappoin I was hoping not to lose that much in the mpg:ugh3:
what to do, what 2 do

Check out Firestone Destination All Terrains. My cousin just put them on his 2001 Tundra and he loves them. He originally had Revo's (the previous owner put them on the truck), then went to the BFG AT's, and now has the Firestones.

I am fairly certain my next tire will be Firestone Destination AT's. I was checking out a Tacoma at the store today that had them, they look like a good tire.

 

[remodelboy]

i have a stupid question. did everybody get their speedo and odometer recalibrated for the larger size before calculating mpgs?

Anybody catch this post? Now I'm wondering if the mileage figures offered took into account the speedo error because of the larger tires.

I hope someone better with numbers can work this out for us. There is a website that shows the circumferences of the various tires that could help calculate the discrepancy.

The Long Story (please skip if bored): In other words, if your odometer used to show 200 miles on 10 gallons, but with the new tires it shows 190 , you might think that your mileage dropped 1 mpg. But let's say you went from a 30" diameter to a 31.5" diameter - 31.5x3.14=98.91 minus 30x3.14=94.2 equals 4.71" (it's about 5%). Based on the new odometer reading, even though it shows that you traveled 190 miles, you actually traveled 200 miles, unless you changed your speedo gear (or recalibrated the sender) you're still getting the same miles per gallon.

I don't know if this is really the case, but it could be. I had some old performance cars from the 70's that got better mileage from larger tires. I guessed that the torque of the engines could easily support a slightly higher rearend ratio (from the larger tires). These Tacomas are very torquey engines and they are geared more for towing than for maximum fuel economy - the slight dip in rpm's (with larger diameter tires) on the freeway might translate into slightly better or the same mpg with larger tires, but your city mpg would take a hit.

Just some BS to tell your wife when you want new tires :naughty:

 

[RT8827]

I didn't quite follow your math, remodelboy, but I agree with your logic (I think).

The "false odometer reading" makes a difference, but it's a little less than 1mpg. More like 1/2 to 3/4 mpg.

The stock tire sizes (either 265/70R16 or 265/65R17) are just under 31" diameter, and they have 680-685 revolutions per mile. If you replace them with 265/75R16 or 265/70R17, both of which are just under 32" diameter, they'll have 655-660 revolutions per mile. Your odometer will read 3-4% fewer miles with the larger tires.

Anyone can easily verify this 3-4% difference by using roadside mileposts. Reset your trip odometer as you pass a milepost. After you drive 10 miles, your trip odometer should show 9.6 or 9.7 (if you've changed from 31" to 32" tires).

So when you calculate your "true" MPG, simply multiply your "raw" MPG by 1.03 or 1.04.

TireRack.com is a great resource for getting tech specs of various tire models & sizes, including the Revs per Mile (not listed for all tires).

 

[ERdept]

Tirerack seems to be a good source of info.

I'm really leaning toward the Firstone Destination AT's in comparison to the BFG AT's.

Firstone has better rating all around and they're cheaper too. I've read many happy owners state their like of the tire and they don't seem to have the balance issues of the BFG AT's.

 

[kanai]

the 1.5 mpg loss that i observe is with the 3% difference in tire-size factored in. from about 17.5 mpg stock to about 16 mpg with the new wheels and tires.

 

[2 tacomas]

These Tacomas are very torquey engines and they are geared more for towing than for maximum fuel economy - the slight dip in rpm's (with larger diameter tires) on the freeway might translate into slightly better or the same mpg with larger tires, but your city mpg would take a hit.

My cruising RPMs were higher with the larger tires...not lower. It took more power for the engine to get them moving and keep them moving. Even with "adjusted" MPG factoring for the larger diameter of the tires you will still see a loss of about 1.5-2 MPG.

Heavier tires = more rolling resistance = worse MPG

Get bigger tires and you will notice that you are filling up more often than you did before, you gotta pay to play.

 

[sechsgang]

My cruising RPMs were higher with the larger tires...not lower.

This does not make much sense unless your clutch is slipping or something.
Bigger tires and same gear means lower rpm's for the same (true) speed (assuming no gear changes or somthing like that).