Tire Calibration

[BAT]

I just did a drive around and used Waze and the Radar. Seems at current 34 PSI my speedo is 2 MPH lower than Waze and the Radar. Will go into the settings this evening and adjust with Tazer and see if I can get it a bit tighter

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[JTGuy]

I just set mine with the Tazer mini. 37-12.50-17C. Set it at 36.5 and it is perfect with my Garmin.

 

[BAT]

37 is high.
Why not use a GPS or speedometer app on your phone?
I used GPS and drove several miles, then compared the truck odometer to the GPS trip tracker and got it spot-on.
Heck, even the stock 33s on a Rubicon are only 36 psi, I'd not run a larger tire with more PSI.

I just got back from a trip and ran the tires at 34 cold. The tires ran very good at that PSI so will leave it like that for now. May tinker with them here and there just to see some options. At 60 MPH it was getting around 20 MPG. When I kicked it up to 70 it dropped off to about 19 MPG on the freeway. Haven't driven them around town enough for city but I also haven't had a chance to change the tire callibration yet which I will do tomorrow.

 

[mgeorge]

Sorry if this has been covered but I did not see a thread…

Just put 35s on and drove from FL to GA.The difference between Waze and the speedometer was consistently 3-4 mph the entire trip. Today I put a couple of hours on the highway driving to ATL. Now they match perfectly. There and back.
Bought the truck used and the stock 33s looked almost new. Several upgrades to the stock version including exhaust and other minor replacements to the engine. Is it possible for the previous owner to have added 35s previously and changed the settings?

I’m having the same issues. Bought a used 2020 Gladiator. I had my 35 tires from a Saraha put on the Gladiator. MPH is off by 2-3 miles. The speedometer calibrator device is expe for a one time use. Local Jeep dealers don’t calibrate the speedometer. Is it a big deal ? Or can I just watch my speed. I did drop from 19/mpg to 15/mpg.

 

[ShadowsPapa]

I’m having the same issues. Bought a used 2020 Gladiator. I had my 35 tires from a Saraha put on the Gladiator. MPH is off by 2-3 miles. The speedometer calibrator device is expe for a one time use. Local Jeep dealers don’t calibrate the speedometer. Is it a big deal ? Or can I just watch my speed. I did drop from 19/mpg to 15/mpg.

Find someone with AlfaOBD who lives near you, or some similar means and get it fixed.
Don't give a dealer a reason to not fix something under warranty for inaccurate miles, plus, it can change shift patterns, etc.

 

[mgeorge]

Find someone with AlfaOBD who lives near you, or some similar means and get it fixed.
Don't give a dealer a reason to not fix something under warranty for inaccurate miles, plus, it can change shift patterns, etc.

Thanks!

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