Cold feet about larger tires...

Honestly, mostly the looks, although I will do some lite off roading probably. Love the 4Runner TRD Pro wheels, and the KO2s. The issue is that it gets tough to find a 265/65/17 tire that is approved for a 7" wide wheel (TRD Pros are 17x7). Almost all of the 265/65/17s have a 7.5-9 approved width range, or at least that is what I noticed. On top of that the 265/65/17 KO2s are E only, and forget that haha

 

What's wrong with E?

 

That's a beefy ass tire, and will be totally unnecessary for his needs.

 

That doesn't make them a problem. Just means that he's less likely to have a bad day if he happens to hit debris on the road. Plus, E's usually have a bit more tread depth than C's or D's, so they actually last longer.

I did the calculation when I bought my last set of tires (about 100,000 km ago, and they're maybe 1/3 worn now), and the extra tread depth was something like 3x greater proportionally than the extra cost.

 

They're also heavier, so it'll hurt his MPG and they have a tendency to make the ride harsher. I have the SL rating in my tires, and dont have any issues, even with airing down and wheeling.

 

Well either way the Es require at least a 7.5" wide wheel. I probably would've went for the Es if they would've fit. I am just really dead set on the wheel. I am sure the 265/70/17 will be fine the more I think about it.

 

Yeah man, you'll be more than fine with the +1 size. Plus you'll love the way it looks.

 

You're overthinking this - but not in a bad way! I'm the same way.

to put you at ease, the 4Runner TRD pro. you know, the vehicle which comes stock with the wheels you want (and I have) comes stock with 265/70/17 Nitto Terra Grappler G2s.

The TRD Pro wheel with any 265/70/17 tire is a well proven sized combo. Just pick your favorite tires and go drive.

One thing I would like to mention, which no one does is the TRD wheels have much less offset, which means your wheel/tire sticks out about an inch more... This introduced a pulling issue on my truck. My caster on the passenger side was at 2.1, and 2.7 on drivers side. The pulling problem did not manifest itself on the stock wheels with the less agressive offset, but was clearly shown with the TRD wheels.

 

I'm not a '17 TRD PRO owner...yet. But I will be soon I hope. I'm getting reacquainted with tire-talk. I was fluent in the 80's when I was a teenager. Lost it. But I'm back. I put slightly bigger (265/70/R17...I think?)BFG's A/T KO's (KO2's weren't out yet) on my '14 TRD Sport and love them. But I think they kill mileage by 2-4 mpg's. I'm supposed to get 19 mpg according to the brochure. I actually get 15 to 16...mostly all city. I don't drive like an a-hole, either (my opinion). Could that slight diff cause 2-4 mpg loss? Don't care if it does. Just curious.

 

E rated is a waste on this application. Totally unnecessary and they weigh a ton. Kills torque and mpg

 

285/70/17 C rated nitto g2's, basically the same weight as the stock trd off-road tires but 2.5 inches taller. Best option imo.

 

Yeah, if you aren't loading heavy or offroading in the nasty rocks, you are just dragging around extra physics. I purposely went with the P265/70/17 Toyo at2s because I just wanted a beefier tread for occasional offroading with minimal road noise and not all the extra rotating mass. I am amazed how many KO2 E's I see on trucks that never leave pavement or haul anything.

 

That claim is absurd.
With this kind of power to weight ratio, the impact of a bit extra weight on either of those measurements will be precisely ZERO. Try putting a tractor tire on a crotch rocket and you might see a difference, but not on a truck.

The problem you are imagining, is that a heavier tire has greater inertia, which in theory will have a (very small) effect on the energy required to accelerate it. But you are forgetting about the flip side -- that same extra inertia will mean that it will coast for greater distances when you let off the throttle, which balances out the energy cost.

And as far as torque goes, that is absolutely false. The wheels could be a million pounds each, and the torque will be identical. It is only when you change the wheel's RADIUS that the torque is reduced.

As far as being "wasted" on this application goes, that too, is incorrect. If you get 20% more tread for 5% more money, then you have SAVED. You are also more PUNCTURE resistant (increased safety), and able to inflate higher in case you need to use the vehicle for an application outside of the "intended use", like snow plowing, or heavy payload.

 

I've experienced it because I've put 1 size larger tires on other 4x4 vehicles and could definitely tell the difference off the line and in gas mileage. So not so absurd because I've been there and done that and didn't like the results. I'm not the only one.. someone else (I believe in this thread) said it killed their gas mileage as well and made the transmission shift worse. Yes. It makes a difference

 

I made the key word BOLD. Nothing at all to do with the load range. Everything to do with the SIZE. The tire SIZE directly impacts torque, and alters the speed and distance readings. Distance, of course, being used to calculate fuel consumption.

To make it simple, a larger tire travels a greater distance per revolution. That means that the odometer will read LOWER than the actual distance traveled. The effect is that your calculation of MILES divided by GALLONS, will yield a lower number.

 

Weight also plays a big roll, hence the emphasis on load range. That's what he was referencing.

 

Weight plays a role so small that it can be safely ignored. And regardless of what he is TRYING to say, the simple fact is that he is referring to a situation with additional variables that he is ignoring.

Now if somebody feels like switching from a P rated tires to an E rated tire of the exact same size, and perform measurements in a controlled and reproducible environment, then we can talk.

 

I disagree, but you can think what you like. That's what's so great about the good ol USofA

 

Weight/mass, size, density and stiffness due to all those extra plys. Nope. Not on my truck! Not needed at all. I drive over some rough shit in the AZ desert and the stock Good year Kevlar haven't failed me yet. Bigger heavier aggressive tires are 95% for aesthetics. You can also shove a rolled up tube sock down your shorts and get the same effect boys... but you aren't fooling anybody.

 

Just keep in mind that agreeing or disagreeing has no impact on fact.