37 KO2 C rated size ?

[sweet88gt]

So I am interested to see what anyone else has as measurements on this tire ? I measured tire height for tazer adjustment I had a 4ft level on the crown of the tire with tape I sat at 35.25 inches. I picked these tires for a few reasons which I am happy with. Has anyone else measured these by any chance ?
They are on Method 315 polished 17x8.5 wheels with stock steel bumpers.

 

[lowmpg]

Exact same measurement. 35.25" (32psi) at the crown of the tire with a level. I measured at the mirror with my 35x12.5 Wildpeak MTs and after putting on the 37's the vehicle sat 1.5" higher.

 

[sweet88gt]

Exact same measurement. 35.25" (32psi) at the crown of the tire with a level. I measured at the mirror with my 35x12.5 Wildpeak MTs and after putting on the 37's the vehicle sat 1.5" higher.

I just wanted to get some feedback on if that was close to what I needed to input for tire size. Thanks

 

[sweet88gt]

I think I need to go back and reset as I believe I put 35.75. Which is not a big measurement but I felt the need to get it right and check with GPS

 

[lowmpg]

So I didn't use that, I used the actual measurement of the tire, before mounting which was about 36.54 per tiresize.com since it is more about correcting revolutions per mile than 'size'.

That loaded in my Tazer had the exact same MPH as Waze all the way up to 85mph..which as far as I tested it.

 

[sweet88gt]

So I didn't use that, I used the actual measurement of the tire, before mounting which was about 36.54 per tiresize.com since it is more about correcting revolutions per mile than 'size'.

That loaded in my Tazer had the exact same MPH as Waze all the way up to 85mph..which as far as I tested it.

Interesting as I search the web and found a youtube video from what I thought was Tazer about measuring the exact tire size.

 

[lowmpg]

Interesting as I search the web and found a youtube video from what I thought was Tazer about measuring the exact tire size.

Regardless of youtube...it's accurate on my Jeep

 

[sweet88gt]

 

[Pinky Tuscadero]

Just check the diameter across the spare
The length of the tire tread does not shrink just because you've got the weight of the Jeep squishing the bottom which is even more exaggerated when folks run low pressure and what the speedometer needs is basically the length of the tread to be accurate and a tazer needs this to recalibrate properly

 

[sweet88gt]

I changed the tire size to the 36.54 and checked via GPS and it does seem much closer to being correct. The smaller number had the transmission holding a few of the gears longer than I remembered and never got into 8th. Now it does spend more time in 7th but I have seen 8th more now. I haven't had it over 50-55mph yet on my way to work. Ill check that maybe this weekend.

 

[lowmpg]

I found the same, much more time in 8th gear and my mpgs have gone up by 2.

 

[CarbonSteel]

Unloaded:

Loaded:

 

[LCW]

Those that have this load range C 37" KO2... Since it's not the "biggest" 37.... Did you swap to it from 35s without any other changes?

 

[sherpaJL]

The proper way to measure tire diameter for input into a speedometer calibration device is to inflate the tire to the proper pressure. Take a measurement from the hub center to the ground and double that number. Input this value for tire diameter.

 

[CarbonSteel]

Those that have this load range C 37" KO2... Since it's not the "biggest" 37.... Did you swap to it from 35s without any other changes?

I had to adjust the tire size in the PCM going from 35's to KO2 37's. Even though they is not the tallest 37's, they are still taller than 35's.

I know of no tire that is exactly the advertised "inch" size it is always some number below that.

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