265/70r18 Tires on my 2019 Ranger Lariat Questions

[Trash Panda]

Good Morning!

I know this is a silly question, but I like to be prepared for anything.

I knew my 2019 Ranger Lariat looked a bit more beefy than some of the other trucks I have seen, and my suspicion was correct.

It looks like the Dealer? Previous Owner? Installed fairly new 265/70r18 National Commando HTS tires on the truck. I did not even notice at the dealership, I thought these trucks looked that way from the factory.

•I am curious to know from you guys if there are any problems I could run in to. Could the gears get jacked up, what PSI do I probably need to run, do I need a new spare, etc. I do not notice any rubbing, so maybe I got lucky?

I am not completely clueless, but I am a novice when it comes to wheels and tires.
(Ex. I know the new tires are taller than stock tires, and I probably have some speedometer error now)?

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[Trash Panda]

@Discount Tire maybe you could chime in?

 

[Trash Panda]

@NedKelly looks like you did something similar. Maybe you could chime in too? What PSI do you run, factory?

 

[Jacob]

Did you pick it up from a Ford dealership? If so I would expect them to properly adjust the Speedo to the new tire sizes and such. Find one of those Highway radar signs and drive by it a few times. Given the +-3mph with radar

 

[Trash Panda]

Did you pick it up from a Ford dealership? If so I would expect them to properly adjust the Speedo to the new tire sizes and such. Find one of those Highway radar signs and drive by it a few times. Given the +-3mph with radar

Yeah I did. The kicker is they did not even bother to fix the open recall(taillights) so I do not know if I have that much faith.. I will drive by one going to work tomorrow.

Is it accurate enough comparing Waze to my Digital Speedo in the truck? On my Civic Si it was dead-on.

I guess my biggest fear is I always go 77-80 on the interstate by the house, and if I am really going 82-85..??

 

[PltFX4]

Yeah I did. The kicker is they did not even bother to fix the open recall(taillights) so I do not know if I have that much faith.. I will drive by one going to work tomorrow.

Is it accurate enough comparing Waze to my Digital Speedo in the truck? On my Civic Si it was dead-on.

I guess my biggest fear is I always go 77-80 on the interstate by the house, and if I am really going 82-85..??

OEM Tire size (265/65R18... 31.56" diameter) MPH vs Current tires (265/70R18... 32.60" diameter) MPH

OEM	Current
28.2	29.1
37.6	38.8
46.9	48.5
56.3	58.2
65.7	67.9
75.1	77.6
84.5	87.3
93.9	97.0
103.3	106.7
112.7	116.4

 

[NedKelly]

@NedKelly looks like you did something similar. Maybe you could chime in too? What PSI do you run, factory?

So the tire shop I had install my tires said factory PSI always no matter if you plus size or not. I was skeptical so I found a website, plugged my OEM specs in and my new tire size and it made a suggestion of 35psi compared to the factory 30psi. I have no complaints with the 35psi. It doesn't bounce/float like overinflated tires. I could definitely tell that I was going faster than my speedo read just by feel (I know, it ain't scientific, but still) so instead of doing 4 over no matter where I went I do the speed limit and it still feels fast. I have a lift kit on the way and there will be a tuner coming around the same time to help with a few extra ponies, torque, the transmission, and the speedo correction.

 

[KDB]

@Discount Tire maybe you could chime in?

Performance takes a slight hit but
Definitely looks better with larger tires and
My fuel economy hasn’t changed.

 

[Discount Tire]

Performance takes a slight hit but
Definitely looks better with larger tires and
My fuel economy hasn’t changed.

The stock 265/60R18 size tire stands roughly 30.52" tall, and the 265/70R18 stands roughly 32.61"tall, so acceleration, and fuel economy will take a hit. The taller sidewall may deliver a smoother ride, and the higher load index (116T vs 110T) will potentially have better stability at a slightly higher air pressure.

The only down side in my opinion is the hit to fuel economy. No harm really in the taller tire IMO.

 

[kieefer]

I’m running Michelin’s on mine at 39psi. 1” wheel spacers and leveled, 2wd. Fuel economy wasn’t affected, noticed no difference in performance.
No issues.

 

[Trash Panda]

I still hit an average of 23.5mpg doing mostly highway. So far no issues running this size on my Ranger. I occasionally will scrub on the driver crash bar if I take a super sharp turn, but that is it.

I took @Discount Tire advice when I initially started this thread and have been running 35 psi.

 

[KDB]

I’m running Michelin’s on mine at 39psi. 1” wheel spacers and leveled, 2wd. Fuel economy wasn’t affected, noticed no difference in performance.
No issues.

I run the same PSI helps reduce outside
Tire wear and feathering

 

[D Fresh]

The only thing you have to be concerned about is those tires.

I'd replace them ASAP.

 

[Trash Panda]

The only thing you have to be concerned about is those tires.

I'd replace them ASAP.

Why’s that? They have a 2049 Date Code (2 1/2 years old) and still have 6/32” tread left.

 

[D Fresh]

Why’s that? They have a 2049 Date Code (2 1/2 years old) and still have 6/32” tread left.

Those are generic garbage IMHO. Tires are one of the most important things on a vehicle. They are your only point of contact with the road. Good tires make all the difference in the world from a performance standpoint.

Those are not good tires. They are the cheapest thing available in that size besides maybe a Ling Long.

I'd get rid of them real quick.

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