Tire change and ECRI

[jlj]

I upgraded the tires on my Overland from 255/70R 18 to 275/70R 18 and it effected the speedometer ever so slightly. Will purchasing an ECRI and calibrating the speedometer impact my warranty? Do I need to change any other settings to get optimum performance since the tire upgrade?

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[vmiaptetr]

I can't answer the warranty question, but I can tell you that if you don't recalibrate, your displayed MPG will decrease.

 

[ShadowsPapa]

I upgraded the tires on my Overland from 255/70R 18 to 275/70R 18 and it effected the speedometer ever so slightly. Will purchasing an ECRI and calibrating the speedometer impact my warranty? Do I need to change any other settings to get optimum performance since the tire upgrade?

Not calibrating may impact warranty because it states anything that makes the odo not keep accurate track of mileage...........
I used JSCAN and a BlueTooth OBD adapter to configure my new tire size.

I used my Garmin to track exactly how many miles I drove and compared that to the odometer reading. Far more accurate than calibrating by mph since speedometers round.
I set my GPS trip tracking to 0, set the truck's odometer trip meter to 0 and drove 17 miles and some tenths. When I got home the GPS and the odometer/trip meter were exactly the same.
My speedometer agreed when I first started - but found that the miles driven was off a bit, so I reset the tire size, used the GPS and checked it - right on.

Anyway, if you change tire size and don't keep the odo accurate it could be a problem at some point, but keeping it accurate is no problem. Many of us have adjusted the tire sizes and done other things.

I prefer other software because things like JSCAN or AlfaOBD can do many many more things, not just calibrate a speedometer.

 

[SargeDiesel]

I upgraded the tires on my Overland from 255/70R 18 to 275/70R 18 and it effected the speedometer ever so slightly. Will purchasing an ECRI and calibrating the speedometer impact my warranty? Do I need to change any other settings to get optimum performance since the tire upgrade?

A Tazer seems to be the way to go.... lots of info about it on here

 

[Lunentucker]

I upgraded the tires on my Overland from 255/70R 18 to 275/70R 18 and it effected the speedometer ever so slightly. Will purchasing an ECRI and calibrating the speedometer impact my warranty? Do I need to change any other settings to get optimum performance since the tire upgrade?

The ECRI does not stay connected. You can remove the device and the security gateway bypass and keep your settings. So there's no way for the dealer to know that changes were made.

 

[Lunentucker]

AND...
You can enter the tire size or use GPS to calculate the proper setting for you.

 

[JeepOfTheseus]

Reprogramming is probably the least of your worries. Honestly, if your dealer wants to be a jerk about it - they could probably claim anything axel, suspension, brake, or drivetrain related could be caused by the larger tires (don’t shoot the messenger - I’m just playing devil’s advocate).

Is it something to lose sleep over, though? No.

 

[ShadowsPapa]

AND...
You can enter the tire size or use GPS to calculate the proper setting for you.

The problem with using tire size is - that varies among brands, and the pressure as well. Rolling diameters vary. The proof is in the tires I'm running now. Same exact diameter - and yet...........
I went to all of the major tire sites, grabbed all of the dimensions I could get - should have been fine, but no.

That's why I use GPS.

Reprogramming is probably the least of your worries. Honestly, if your dealer wants to be a jerk about it - they could probably claim anything axel, suspension, brake, or drivetrain related could be caused by the larger tires (don’t shoot the messenger - I’m just playing devil’s advocate).

Is it something to lose sleep over, though? No.

They won't and frankly, can't. And all you have to do is take it to another dealer if you run into a turkey. No use tossing a scare out there when there's nothing to be concerned about.

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