Question for those who have installed bigger tires

[CFR68]

You do know going up from a 235 to 245 DOES increase height, right?

Lots of great advice apparently from someone who doesn't even know what changes in tire size actually does.



Just. Saying.

Somewhat, yes. Your biggest difference comes from 70 to 65 if height is you worry. Just Saying.

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[Montana]

Somewhat, yes. Your biggest difference comes from 70 to 65 if height is you worry. Just Saying.

So it does. Just want to make that clear. Thanks for weighing in.

The jump from 235/65R17 to 245/65R17 is a half inch in diameter. The jump from 245/65R17 to 245/70R17 is a full inch. You added width, height and weight and decreased your revolutions per mile by almost 40.

That is definitely overkill on these little things. Man, I've been there and done all that with tires. It's just not worth going that many sizes up when the goal is looks. Cool factors can be achieved with a good set of tires, they don't need to be oversized especially when there is no real benefit from them being oversized. I put 245's on mine knowing it was two sizes up from the 225's it came with. I've always lifted and used massive tires. I'm just trying to give them a perspective from someone that has always done overkill. It's really not worth it.

 

[CFR68]

So it does. Just want to make that clear. Thanks for weighing in.

The jump from 235/65R17 to 245/65R17 is a half inch in diameter. The jump from 245/65R17 to 245/70R17 is a full inch. You added width, height and weight and decreased your revolutions per mile by almost 40.

That is definitely overkill on these little things.

Yeah, I know. I did all the research before I went "overkill" on my "little thing". I also factored in tire weight; rotating mass is huge. I'm ok with my 1.5 MPG loss. Enjoy your 235's and not having to worry about the wheel well liners catching fire. Let the overkillers live their lives.

 

[hdave]

Agreed with @Montana when he says overkill.
245/70/17 has literally zero benefits over stock size in terms of performance and usage, the only 'benefit' is that it looks better which is subjective anyway.
That size however does have several detriments such as possible rubbing, heavier wheel causing quicker wear and tear on components, and reduced fuel economy. None of those will cause the truck to explode.

The beautiful thing here is that we can all agree on the above, and folks can choose whether those detriments are worth it for the look.

There's also the middle ground of 235/65/17 and 245/65/17 which can reduce some of the issues, and also improve the look.

 

[Montana]

Yeah, I know. I did all the research before I went "overkill" on my "little thing". I also factored in tire weight; rotating mass is huge. I'm ok with my 1.5 MPG loss. Enjoy your 235's and not having to worry about the wheel well liners catching fire. Let the overkillers live their lives.

I edited my post and you should read it.

Your 1.5 loss is YOUR loss. For me, 245/65R17's equated a 2-4 MPG loss (and most report around the same too). So you must be perfect driving conditions. Most people who do this don't even have the truck long enough to judge normal driving conditions anyways before they swap tires, so I take the reports of MPG losses with a grain of salt. Especially when done during the break in periods or honey moon phases of ownership.

If someone wants to buy that size tire, they are going to do it. Best of luck to you. I'm sharing my experience across multiple vehicles. Don't like it? Ignore it. All I'm trying to say is why? Just get the middle ground and don't worry about any of this crap.

You got a good looking truck btw. No hate or resentment in my heart towards you and there never was

 

[Cocobean]

Yikes…

 

[AzureBlueBill]

I edited my post and you should read it.

Your 1.5 loss is YOUR loss. For me, 245/65R17's equated a 2-4 MPG loss (and most report around the same too). So you must be perfect driving conditions. Most people who do this don't even have the truck long enough to judge normal driving conditions anyways before they swap tires, so I take the reports of MPG losses with a grain of salt. Especially when done during the break in periods or honey moon phases of ownership.

If someone wants to buy that size tire, they are going to do it. Best of luck to you. I'm sharing my experience across multiple vehicles. Don't like it? Ignore it. All I'm trying to say is why? Just get the middle ground and don't worry about any of this crap.

You got a good looking truck btw. No hate or resentment in my heart towards you and there never was

Perhaps your MPG loss is due to the fact that you are actually traveling further than your odometer shows. Do you factor that in when you calculate MPGs? If not you are getting erroneous readings. Going to a 245/65-17 vs the stock size is a 3% gain in actual miles traveled vs what the odometer/computer thinks you traveled.

 

[Montana]

Perhaps your MPG loss is due to the fact that you are actually traveling further than your odometer shows. Do you factor that in when you calculate MPGs? If not you are getting erroneous readings. Going to a 245/65-17 vs the stock size is a 3% gain in actual miles traveled vs what the odometer/computer thinks you traveled.

All the fuelly and manual calculations confirm it's been a 2-4 average loss since jumping on the bigger size. Stock setup I was getting 28 MPG and now I get around 25. Granted, I can hypermile but I don't. Hence the estimate.

Not a big deal to me, but it would certainly be greater going up another size and so on. I've never had just a 1 MPG drop going up multiple tire sizes. In the Tacoma I had it took a tune and gears to get back within a 1-3 MPG loss average after going from 265/70R17's to a 285/70R17 and a previous F150 which also went from 3.53's to 3.73 gears in the same process saw the same loss. So 1 MPG I think is being very generous going from 235/65R17 to 245/70R17's. I'm sure it can be done to prove a point though...

But MPG loss here would be the least of my worries. I can handle the loss in fuel efficiency, the question is can the truck handle the added tire size. Lots of evidence points to 'No' especially on non Tremor variants with out super high quality CV's

 

[Snox801]

Exactly. 245/65R17 KO2's here and they are total overkill for this truck. I'll be going with 235's next time.

You just need a tune not smaller tires. Lol

 

[baztien.xplrz]

I have a set of Hankook Dynapro AT2 in 235/65/17 and absolutely no rubbing just FYI. Good Luck

and this is without a lift installed?

 

[Mdmac]

and this is without a lift installed?

Yes sir, I have no lift on my truck and absolutely no rubbing. Good Luck

 

[FischAutoTechGarten]

Your 1.5 loss is YOUR loss. For me, 245/65R17's equated a 2-4 MPG loss (and most report around the same too).

You are running those BF Goodrich KO2s.. That's an very aggressive tread on a heavy tire (35lbs). I'll be doing a Michelin all season at 245\60 R18 that weighs 31lbs. So, I hope not to see large drops in economy. I know I will as the stock wheels are 27lbs. My desire to go a bit bigger is just the uncomfortable nature of Mexican roads that I travel 6 months out of the year. I get a slight boost in ground clearance, slight boost in sidewall for ride comfort, and slight boost in width for staying out of smaller potholes. (I went from 235 to 265 on my Frontier and the comfort while driving in Mexico was very noticeable) AS tread is find for me, I don't need AT tread even though we venture out on many dirt roads with lots of challenging features.

I know, I know, that I could swap down to 17" rims and go with a higher profile to gain comfort and ground clearance.... but I don't think it would change the weight much.

A 70 series though is adding significantly more weight than a 60 or 65 series tire due to added profile, no? There are some users on this site running 255\70 R17 with massive tread... That's got to hurt economy and wear and tear.

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