dodgemaniac

i am going to be geting my new 35in. toyo soon and was wondering what kind of milage i would get. i get 16 now with the stock 265 and 4:10 gears

as i understand with the 35's it would change my axle ratio to 3:73

will i get worse or better milage with the new meats?

Strjock81

My mileage suffered when I went to 35's from 295s.

snoyes

Are you putting a lift on the truck as well, or just run stock height? I think I lost about 1 MPG overall with the tires and lift, but I have the 3.73s and the G-56.

Ram Daddy

If you don`t lift it , and drive mostly on the hwy. , then you should see a small increase in mpg , due to the RPMs being lower.

Other than that it will probably be the same or a little lower than stock.

Remember to re-calibrate your speedo when trying to figure out your new mileage , because it WILL be off , and it WILL make a difference.

Sandaholic

Mine was stock for a total of about 100 miles so I can't say what milage was then? I get a solid 15-16 drivin' normal=heavy foot!

chipmonk

with g56 and 3.73's, 35" toyos helped my highway mileage by dropping my rpms. overall, it's just about the same as when i was running the 33's.

DUKFVR

I lost a 1 1/2 top 2 mpg when I went to 35 Toyo's. No difference after I lifted it.

DrMike

Aerodynamics and driving habits are critical to fuel mileage - especially on these trucks. Let's face it, we're driving "brick walls." Assuming driving habits remain the same, the 35" tires will raise the heigth of the truck roughly
1.75" over stock. So, you're going to catch a little more air. And if you've leveled the front with a 2" spacer you will catch more air still. The 35s are also approx. 2" wider than the stock tires - they will also catch more air, along with the fact that thier larger footprint and increased weight over stock tires will mean a greater rolling resistance. The larger the tire the more aerodynamic drag and rolling resistance produced. That's the bad news.

The good news is if you have 4.10s the larger 35s will reduce your effective gearing to something in the 3.70 - 3.80 range. But, my study on this issue leads me to believe that isn't as big an advantage for fuel mileage as one might think - and that is especially true if you tow reasonably heavy loads. For example, I have 4.10s. I seem to be getting about the same highway mileage running empty as folks running 3.73s. But, I make it a point to run at no more than 2000 rpm (approx 67 mph in OD - .69 4th gear ratio). My guess is, in town, the 4.10s will get slightly better mileage than 3.73s. At least that's been my experience with other trucks I've owned.

These trucks seem to get the best mileage at or below 2000 rpm. But, not only is rpm a limiting factor on mileage, truck speed is as well. In other words, turning 1900 rpm, but going 75 mph is likely going to mean that whatever mileage advantage you might gain by running at 1900 rpm you will likely lose due to increased aerodynamic drag exerted on the truck at that speed.

Based on litterally 100s of posts I've reviewed on this subject, both here and on other sites, their seems to be at least some consensus that, all things being equal, larger tires more often than not will end up costing you some fuel mileage, but not a great deal - perhaps a mile or two per gallon. But, not everyone would agree on this point.

Curtis Woodyard

I have some questions....I have an 05 Dodge 2500 35 inch tires w/4 inch lift w/stock 4.10 gear.
My question is what kinda of mileage is everyone else getting with a similiar truck. I have heard reports of 14-16 mpg. I have never gotten that from day 1. The best I have gotten under towing conditions is 11.5 mpg. The last 4-5 tanks of fuel, I have been averaging 9.5 mpg. Towing a combined vehicle weight of 12,500 lbs. The truck runs excellent...no problems and pulls the load just fine. No aftermarket modifications done to the truck other than the lift and tires. I feel that this mileage is poor comparing to other peoples claims. Does anyone have ANY suggestions on what would help?
Also, alot of the towing I do is open road 65-75 mph loaded. (Empty weight mileage is 11.5-13.5)

Thanks in advance for any suggestions/comments.

Sandaholic

I believe those 4.10's are killing you on the highway. Hard to say though. I bet if we did an all in town comparison of milage pulling the same weight your truck with the 4.10's might do better than mine. FWIW the bulk of my towing is for vacation purposes and ends up being mostly highway. So there will be a big difference in reported mileage since I am up to speed on the highway compared to stop and go.

Curtis Woodyard

Thanks for the info...mine is an automatic. I really don't want to change tires, as I just invested in a brand new set of BF Goodrich mud terrain and I do not have the stockers, so I guess I am SOL.

I own dump trucks and I'm pulling 75,000 lbs down the highway and get 6 -6.5 mpg...You would think with a smaller engine and less weight I could get better....
If fuel prices keep going up...a big block is looking better every day

chipmonk

unless that's just the nature of the 4.10's, that seems crazy low to me. i can pull off 20 mpg (empty), with 35" toyo m/t's, 3.5" lift, and 3.73's- most of my driving is highway, though.

NDanecker

I would rather spend the money on doing a gear swap then tires. I went thru a few tires size changes & gear swaps and from the reading I've done and personal experience that would be better money spent. but - it depends how you use your truck, and if 'all show' is more important then 'all go'. If you tow anything especially heavy stay away from 35's, imo. The bounce is more, you get more side sway as there is more tire meat between rim and road, and the rolling resitance is more. More importantly, your brakes will need to work much harder trying to stop with 35's vs. stock tires no matter what gears you have.


Good Luck!

dodgemaniac

should i go with a 295 instead of the 35 then?

DWK

I'm seeing right at 20MPG hwy (hand calc) If I keep it at 65 MPH or less. I am running 35's with a 2" level kit.
Now if I run 75-80MPH it drops to 12-13MPG. For me its a no brainer to slow down some.