265/70R16 vs P265/65R17

any pros and cons? thinking about getting bigger tires for my 2010 double cab sr5 with oem lift and steel wheels. will my speedometer be off? any loss of mpg?

 

Those are just the stock sizes. They are the same size overall, just different wheel size

 

@02YotaGuy forgot to mention im going from 245 to 265. What would you recommend? also what brand tires?

 

From a 245, you're mostly gaining width. The speedometer wont be that far off. 1.5mph off at 50mph, so 51.5 actual. I had really good luck with Nitro Terra Grapplers on my 02 (265/75R16) and I like the Duratracs I have on my 05 right now (265/70R17). Going up to those sizes will make your speedometer even further off though. There are plenty of good tires, it's going to come to budget and personal preference. If you plan on going off road a lot, you may consider a more aggressive all terrain or mud terrain.

 

@02YotaGuy thanks for the info. i will probably go with 265/75R16. i feel like the 245 look really tiny on my truck with the extra space in the wheel wells. also any notice of mpg loss? could you recommend any tires for commuting don't really go off road anymore.

 

The Cooper Discoverer HT should be a decent all around tire. I can't remember the last time I looked at normal tires. I don't pay attention to my MPG. Lift plus Duratracs and 200k miles aren't a great combination for efficiency.
And going from 245/75R16 up to a 265/75R16, your speeds should be:

 

Go to 265/75/16's and call it good. You'll gain 1" of height and width over 245/75/16's with no noticeable loss of power. My speedo and odometer were off with factory tires and right on once I moved up to 265/75/16's. That is also a much more common size with more options and better prices.

 

Other considerations
1. going to a larger tire generally means a heavier tire - less miles per gallon.
2. width from tire specs is overall width - NOT tread width - check detailed specs from tire manufacturer. Wider tread width - less miles per gallon. Also check specs for tire weight.
3. Your speedometer is already reading 2-3 miles per hour high from the factory at 60 mph, very common regardless of vehicle manufacturer.
4. Know anyone who has 265/75R16 tires on a Tacoma ? If so, take a close look. It might not fill the wheel well as much as you want.

 

Go with the 265/75/16. I have ko2 and really like them. But e load will hurt your mpg's.

 

Also, I disagree with Marshall R - my speedometer was off 2-3 mph, but my odometer was spot-on from the factory - verified with both GPS and 50 mile comparison to mile markers.

 

That varies as tires wear. My 265/75/16's when new were 1" taller than the factory 265/70/16's. But they currently have 56,000 miles on them and are now roughly the same size as the factory 265/70's and both the odometer and speedometer are back to where they were originally.

It's pretty rare for a vehicles odometer or speedometer to be exactly the same as the GPS. Such small differences are common and shouldn't be of any concern. My son works in electrical construction and as projects are finished he will change work sites every few months. A couple of years ago he was driving exactly 100 miles round trip to a worksite and had been doing so for months. He asked me one day why he suddenly was only driving 95 miles instead of exactly 100. I pointed out that he had recently put new tires on his car. Even though they were exactly the same tire and size as before the greater diameter of the new tires required fewer revolutions to make the round trip.

On a Tacoma a 265/75/16 is a good compromise. It is just enough bigger to look better in my opinion with no modifications needed and any loss of performance or fuel mileage isn't enough to matter. I still get 20 mpg hwy with them. Any bigger and you need to start lifting and you'll see performance and fuel mileage losses.