Tire Change

[Sarge Bill]

2021 Gladiator Overland.. I replaced the stock tires (255/70 R18) with Falken Wild Peak 275/70 R18... what effect will that have on my speedometer?? Am I going faster then it says or slower?? How much is it off... the Falkens are about 1.2" larger

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[bleda2002]

2021 Gladiator Overland.. I replaced the stock tires (255/70 R18) with Falken Wild Peak 275/70 R18... what effect will that have on my speedometer?? Am I going faster then it says or slower?? How much is it off... the Falkens are about 1.2" larger

https://tiresize.com/speedometer-calibration/

Bigger tires means the speedo (and odometer) under-read. At 65 you're ~ 2 mph off

 

[Sarge Bill]

https://tiresize.com/speedometer-calibration/

Bigger tires means the speedo (and odometer) under-read. At 65 you're ~ 2 mph off

Thanks...that was a helpful chart... so I need to be careful as I am faster then the speedomitor

 

[bleda2002]

Thanks...that was a helpful chart... so I need to be careful as I am faster then the speedomitor

I'd grab jscan and the bluetooth obd with sgw cables and fix it. It will help the transmission know what gear to be in and also fix things like inaccurate mpg and range

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