Dec 14 , 2020
Did You Know How Changing Tire Size Effects Your Vehicle?
If you own a Truck or Jeep Wrangler, chances are, you've thought about a lift and bigger tires. But you should consider a few things before you commit.
First, is this your weekend project truck or your daily driver?
If you're just using your truck for mudding, you really don't have much to worry about. It's about suspension and how high you want to go.
If you're putting larger tires on your daily driver, then you need to consider a few things.
First, expect lower fuel economy. Larger tires will often add more weight or mass to your vehicle. If you're considering new wheels as well, they could potentially add to the weight and mass.
Weight and mass means using more fuel. It also means more wear and stress on your brakes.
The increased size causes the tires to rotate slower to cover the same amount of ground.
You'll also need to reprogram your truck or Jeep's to the appropriate control unit to adjust speed and odometer calculations.
Larger tires have larger circumferences. Your vehicle's computer calculates speed and miles driven based upon the factory tire size. Changing the tire size means changing the calculation.
If you don't, your speedometer could provide a false reading, which could result in an unwanted speeding ticket and your odometer to register fewer miles than you are actually traveling.
And if that isn't enough, you'll probably get an error light, because your TPMS will be weirded out as well by the larger tire circumference.
Here's a quick and simple way to make the computer adjustments, The OBDGenie 'Tire Size Change Programmer'. With this you don't need download any software, figure out confusing settings or purchase additional tools.
No warning lights, your speedometer reads correctly and your odometer will be accurate.