Fuel economy with 35 inch tires

[Billet1500 4x4]

These trucks look great with a level and 35's but most 35's weigh almost double what the stock tires weigh. What types of fuel economy are you guys seeing that are running 35 inch tires and gear ratio?

 

[ksn240]

These trucks look great with a level and 35's but most 35's weigh almost double the what the stock tires weigh. What types of fuel economy are you guys seeing that are running 35 inch tires and gear ratio?

I'm rocking 34s and can still get 18-19 on the highway. 35s would probably be another 2-3 mpg hit. Looking at your signature, you have the 3.21 gears (as do I) and people are split on whether 35s are acceptable or not with those gears. When these tires wear some I will still probably look at 35s and a tuner to negate some of the power loss.

 

[356]

...people are split on whether 35s are acceptable or not with those gears.

If the truck with 3.21s can pull 7000# trailers all day, I’m guessing 35s will not be an issue.

 

[ksn240]

If the truck with 3.21s can pull 7000# trailers all day, I’m guessing 35s will not be an issue.

Not saying it can't do it. You just lose some power because the bigger tire makes the gear much lower. Also may experience more shifting on the highway between 7 and 8. I will be looking at some after my 34s wear out.

 

[BossHawg]

I got 34’s 3.21 and I average 15. I had 35’s on it for about 2 weeks and i could feel the drain on the power. I didn’t like it at all. When they put the 34’s on it felt almost like it did stock.

 

[ksn240]

I got 34’s 3.21 and I average 15. I had 35’s on it for about 2 weeks and i could feel the drain on the power. I didn’t like it at all. When they put the 34’s on it felt almost like it did stock.

I can't really tell a difference with the 34s. Had 34s on my 3.21 2013 Ram as well and it was fine. If I go to 35s it will be a bit. Already did the Carven catback, and plan on the Mopar intake. Will also be getting a Pulsar so it should make a big difference and make 35s doable.

 

[Icecold77]

To answer your question... 35s x 11.5in wide highway 15 to 18mpg depends on how u drive a bit too.... around town 14ish.. had same results with last gen 2014,15,17etc.. if you don't put alot of miles on, I say dont worry about it.. I have a 65 mile a day total-commute back and forth.. I knew what to expect.. anyone tries to say you wont lose mpg is dreaming...Understand like everything on trucks you have to pay to play-period.

 

[Bdog]

I have 35x12.50 mud terrains on my truck. I put them on at 500 miles and have 1000 now so this isn’t a huge amount of data but it seem I lost about 3 mpg. I like the tires and they changed the trucks appearance like night and day and I would do them again but they did change the ride. Most notably for me is when you hit minor potholes and variations in the road. The larger tires want to go their own way and you can really feel it in the steering wheel.

I have the 3.21 gears and the power loss is noticeable but not bad or drastic.

 

[Blazn]

To answer your question... 35s x 11.5in wide highway 15 to 18mpg depends on how u drive a bit too.... around town 14ish.. had same results with last gen 2014,15,17etc.. if you don't put alot of miles on, I say dont worry about it.. I have a 65 mile a day total-commute back and forth.. I knew what to expect.. anyone tries to say you wont lose mpg is dreaming...Understand like everything on trucks you have to pay to play-period.

That's what I'm getting with 33s

 

[ksn240]

Took about 30 mile trip down the highway today, 3.21 gears and 275/65 (34s) averaged 19 mpg staying between 60-75 mph.

 

[Icecold77]

My mpg changes dramatically on how I drive too.. If I'm in it all the time it drops off.. old man driving goes up a good bit..lol

 

[ksn240]

My mpg changes dramatically on how I drive too.. If I'm in it all the time it drops off.. old man driving goes up a good bit..lol

Very true, if I keep my foot out of it and stay at 60-65 I get about 21 mpg still. Just got back from an hour trip down the highway going 80+ the whole way and got 17.

 

[Tat2GirlAz]

3.92 gears 20x11 with 35" tires on a 6" lift. My display shows a 15.9 average with a corrected speedo.

 

[Billet1500 4x4]

They did such a good job piping the engine note into the cab and the 5.7 just sounds so nice its hard to keep your foot out of it

 

[ksn240]

They did such a good job piping the engine note into the cab and the 5.7 just sounds so nice its hard to keep your foot out of it

Agreed. Doesn't help that I added the Carven exhaust and love making it rumble.

 

[KurtA]

3.92 gears 20x11 with 35" tires on a 6" lift. My display shows a 15.9 average with a corrected speedo.

Did the dealer do your speedo correction? How much?

 

[Tat2GirlAz]

Nope the dealer can't correct your speedo, you gotta get someone with the software to get in there to correct it or buy one off the aftermarket. I believe Rough Country sells a module. My buddy went in and fixed mine.

 

[JonR88]

3.92 gears 20x11 with 35" tires on a 6" lift. My display shows a 15.9 average with a corrected speedo.

Can I see pics of your truck. Curious how it looks with a 6 inch lift an d35’s

 

[Tat2GirlAz]

Can I see pics of your truck. Curious how it looks with a 6 inch lift an d35’s

Ask and ye shall receive

 

[19llhpb]

My signature has my truck details. With the options, accessories, and items I keep in and on the truck (hitches, chain, clevis, tools, exc.) I am weighing around 6,300# fully fueled. With the lift and 35”s I am consistently right at 16 mpg on roughly 70% two lane rural highway and back country roads and 30% in town.