Mpg loss from heavier stock sized tire trd or

Hey all! From what I can tell the stock gy wranglers are 35lbs. I want to upgrade to stock size 265/70r16 stmaxx and they are 54lbs. I believe ko2 are the same weight as stmaxx. What kind of mpg loss have you experienced going with a heavier tire in stock size? Thanks!

 

My rum tire combo was 10lb heavier than stock per wheel, get around - 3 to 4mpg

 

I swap between stock and ko2 for winter. I lose about 2 -3 mpg with the ko2s on.

edit: ko2s are a bigger size 265/75/16. stock are whatever stock sr5 tires are.

 

i did 275 70 tires and im noticing probably 1.5mpg loss

 

on my old Tacoma I went with load E and lost a couple MPG, brakes felt weaker also lost some power and was bumpier. This was I think 265/70/16 so still a stock size

 

About 20-30% less efficiency.

 

Wow. Looking at these replies I may need to go a different direction. I dont think I can stomach a 20% to 30% loss in fuel efficiency. I see the terra grappler is 40lbs per tire. Maybe I should go that route instead.

 

You gotta pay to play man.

 

I went from stock to Method wheels and those tires. Still have the same MPG in regular commutes of 18-20 MPG based on traffic and dickheads in accidents.
Stock:

Upgrade:

 

I went from Cooper RTX in the factory size at 38 pounds and now have ST Maxx in 265/75 so a little bigger and 56 pounds. It was the same weight as the 265/70. I saw about a 2 mpg drop. More so in the city where my drive to work is surface streets with mild traffic and stop lights.

 

You are going to a heavier and more durable tire. With current tire technology, that means more energy is need to turn it and stop it. The penalty is less mpg.

 

Ya I understand that but some people are saying a 20% to 30% decrease. I could stomach 1 to 2 mpg but not a 4 to 5mpg loss. You dig?

 

An engine that’s weak on torque on the low part of its power band will be most impacted by heavier and larger wheels/tires. Gearing is also a factor here.

 

Good god, if it were 30% loss, I'd sell those tires immediately. The drop isn't bad depending on speed. Around town and higher speed roads is fine, but my mpg REALLY takes a hit at 75+. Used to be I could get 18.x mpg at 80mph, now I'm pushing lower 15.1-3. That's about an 18% drop. That said, I'd gladly pay that premium to trust the tires to stand up to abuse in the Utah backcountry much more so that the P rated versions.

One thing I would recommend is getting a scanguage. I have mine for instant and average MPG across the bottom. Really makes a difference in your driving habits.

 

I put 265 Cooper AT3 S4's on mine, 44 lbs and about 2 mpg I lost...

 

supposedly HANKOOK ATM are a high rated AT tire at 37lbs.

$227+ Hankook Dynapro AT-M Tires

https://www.tirerack.com/tires/tire... White Letters&partnum=67TR6RF10OWL&tab=Sizes

 

I am skeptical that it could result in a consistent 30% hit from just the tires. My commute is all surface streets, I have 12 traffic lights to go 2.5 miles--lots of stop and go. In the winter I swap to ko2 and carry ~200 lbs of sand bags in the bed for good measure, and I see 3 - 4 mpg loss. My highway driving is 55 - 75 mph and i see a smaller impact, about 2 - 3 mpg off my highway efficiency.

 

A load range "C" tire would be a good fit for a Tacoma without such a weight penalty. You may need 17" wheels to have more options but plenty of people are always selling their stock wheels for cheap.

 

+20lbs per tire (all of which is weight at the outer edge of the tire which makes this all worse due to rotating mass) is going to net at least a 2-3mpg decrease.

I went form a 39lb AT tire (the hankook dynapro atm RF10 in a P265/75R16) to a 46lb tire (cooper AT3 in a LT265/75R16 load range C, not even an E) and INSTANTLY noticed a difference (negative) in acceleration, braking and about a 1mpg loss. Next tire is going to be a P265/75R16 (same diameter as my previous and one notch bigger than stock) in a road tire, Michelin Defender LTX which is 40lbs and will get me back to close to my stock mpgs with a 37lb rugged fail stock tire (2nd gen TRD OR stocker)

 

I went from a 265 70 17 KO2 E load to a C load same size. My MPG went from 16 mpg to 17 mpg, so barely any difference. I thought it would be a bigger change but it wasn’t. You start out with better mpg being a 3rd gen.