Tire Size on 4 banger

Looks really good!! What size tires you have on there?

 

I'm a little late to the party here, but

I've got a stock 06 and I went from the itty bitty 215 70s that it came with up one size to the 225 75 Wranglers. Here's the look

https://www.tacomaworld.com/threads/side-by-side-pics-before-and-after-2nd-gen-5-lug-reg-cab.368775/

With the manual 2.7, there's a very noticeable difference in performance. Not so much that I'd go back, but it is significant. That said, if I bought another 2.7 5 lugger manual tomorrow, I'd go up to this size tire again in a heartbeat.

I can't say for the automatic though.

 

245/75 OEM Dunlop (30 some lbs) to 265/75 Cooper ATP (41 lbs) is a bit of a loss but I mainly notice it at the tank and when passing. Otherwise normal day to day stuff I don't really notice while driving, the main difference was MPG.

2.7 auto DCSB Prerunner.

 

I appreciate your reply! Thank you that's all good to know. You're wranglers look a lot better on there for sure!

 

I think I'm also going to move from the 245/75 to the 265/75.. What kind of difference are you seeing in mpg? Also has it effected your speedometer?

 

I can't believe that you guys are worried about .2" Like already stated most tires are not the actual size they are advertised as. I would and do call a 32.8" tire a 33"

 

245/75 to a 265/75 is wider, not taller, so your speedo should not be changed.

I went from the 70 to a 75 and my speedo is around 6-7% low now. Also, with mine, I'm down between .5 and 1 MPG overall, it depends a LOT on keeping my foot out of it on the highway. I went wider AND taller.

 

Yes a 265/75 will be taller than 245/75.

265/70 is comparable to 245/75.

 

Unless tires have fundamentally changed in the last 15 years since I turned wrenches last, no.

The 245/265 number is tread width. Wideness. The sidewall size/height is the 60/65/70/75 number, with a larger number being a taller sidewall and resulting in a larger diameter wheel.

A 265/75 and a 245/75 are the same height from the bead to the tread. The 265 will be a wider tread.

A 215/70/15 is 215 wide across the tread, 70 high from the bead to the tread, and 15 is the diameter of the rim it fits. When I went from that to the Wrangler 225/75/15s, I went 5 higher in sidewall (meaning a larger circumference tire, and my truck is about a 3/4 inch further off the ground now) and 10 wider in tread width, meaning each tire has a wider patch of rubber on the ground at any given time.

I'd happily say how wrong I was if someone shows me proof this is incorrect.

 

Your understanding of what the first and second numbers mean in relation to each other is flat wrong. 265/75 had a larger OD than 245/75.

Check a tire calculator if you don't believe me.

 

Here

 

this was my understanding:

Aspect Ratio is the ratio of the height of the tire's cross-section to its width. The two-digit number after the slash mark in a tire size is the aspect ratio. For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire's width. The bigger the aspect ratio, the bigger the tire's sidewall will be.

Correct me if I am wrong, I am novice and read this online.

 

That is correct ^

The second number is the height of the sidewall. But it's the percentage of the first number, which is the width in millimeters.

 

Actually, we're *both* right, in certain circumstances.

The aspect ratio number (the 60, 70, 75, etc) is a percentage of the sidewall width. So I was very wrong in saying it's the same from tire to tire by the width number.

Where I was right, and it's how I was taught but without an actual explanation about 35 years ago, is that when matching two tires with the same aspect ratio number, the width number changing means wider size (and usually wider tread, although not always). I didn't know it was a ratio number though, I had thought it was a flat measurement instead of changing with the sidewall.


So, you are a LOT more right than I was, definitely. Learn something new every day!

 

Yep. As I just learned.

 

I really appreciate your guys help on this! So I have to pick your brain for one last question. If I went for a 255/85 as opposed to 265/75 it would in fact be taller? With a 3" lift would I have to worry about rubbing?

Thanks again guys

 

https://www.tacomaworld.com/tirecalc?tires=255-85r16-265-75r16

Go to the top right and look at the 'side by side' and 'overlay' radio buttons, they'll show you the pics

The 255/85 is a bit taller...about 1.5"

 

Cool man.. Sorry for all the amateur questions. Thanks again for your help

 

I just got schooled and tossed out 3 decades of 'getting tires' knowledge upthread. We're ALL amatures in here!

The important thing is learning from one's mistakes and using the correct information going forward.

 

I was averaging 23-24 MPG stock, with a high of 28 on a whole tank of highway miles.

Now with a lift, P265/75/16 Cooper ATPs I'm averaging 18-19 MPG and my highway mileage is unknown yet, so not sure what my high will be.