Any Advantage to Going 265/70?

My 21 Sport has the OEM 265/65x17 Toyo A30s on 4Runner TRD Pro 17x7 4mm offset cast aluminum wheels. I'm starting to do research on going to an A/T tire. Nothing too aggressive as I don't do any serious off-roading - was thinking along the lines of a Michelin LTX AT2 to keep as much of the on-road manners as possible. My question is, other than the extra 1/2 inch in height, is there any reason to go up to a 265/70, and would I have any rubbing issues with the 4Runner wheels and OEM mud flaps? My speedo seems to read about 1 MPH fast as it is now so I'm not too worried about the difference with the larger tires from that standpoint.

Thanks and my apologies if this question has been asked already!

 

I would. Unless you run the hwy 99% of the time and mpg is of #1 importance. Had the same exact wheels and 265/70s on with no issues at stock height.

 

Nope maybe 10-20% highway. 1-2 MPG either way isn't going to be a huge issue.

 

Been running 265/70 16's on my sr5 for 2 years vs the stock 245/75 16's that came on it. Really haven't noticed any negative results. Both tires are about the same height, the 265 ones are a little wider. They seem to ride smoother.

 

Because the offset of your wheel changed from +30mm(stock) to +4mm, you want to go with a taller to keep as close to the stock scrub radius as possible.

A 265/65/17 on that wheel, would add 26mm of positive scrub from stock.
A 265/70/17 on that wheel, would add 22mm of positive scrub from stock.

You realize, the Michelin LTX AT2 in 265/70/17, is only available in load E; weighing in at 49 lbs?

 

On tirerack.com there is an E rated version but there is also the "standard" load version:

$303+ Michelin LTX A/T 2 Tires

https://www.tirerack.com/tires/tire...AT2OWLV3&vehicleSearch=false&fromCompare1=yes

 

My bad...I checked there before my reply; didn't see it.

 

No worries sir. I appreciate the point about scrub radius. Made me look it up and read about it since I had no idea what it was LOL. Now I do...sort of

 

In short, it's the interaction between your steering geometry, tires and road surface.

You're already at 26mm added scrub; 22mm added scrub is not much of an improvement. You'd need a 37" tire to get back to zero added scrub with a +4mm offset wheel

 

I upsized years ago from 265/70/16 to 265/75/16. Those overall dimensions are virtually identical to 265/65/17 and 265/70/17. In my case the larger tires were more common, with more options, and priced cheaper than 265/70/16's. It was a no-brainer for me, but I haven't priced 17" tires. It made ZERO difference in fuel mileage even when I went to E rated 265/75/16's. My speedometer and odometer were closer to being accurate with the bigger tires.

I didn't specifically seek out the E rated tires, buy fell into a steal on a set of them. The ride was a little rougher, and the weight did make a difference in acceleration, but not fuel mileage. When those wore out I went back to P rated 265/75/16's.

The extra 1/2" looks a tad better to my eye. Any advantage off road is going to be pretty small, but I don't see any downsides either.