Compare 235/75R15 vs 31/10.5R15

Let's break down what happens when you switch from your original 235/75R15 tires to the new 225/45R17 setup. The new tire has a total diameter of 25.0 inches. This means it is 13.5% shorter than your factory tire. Knowing this size difference is the first step to making sure your new tires won't rub against the car's body when you go over bumps.

A quick heads-up: car experts usually recommend keeping the size difference under 3%, and your new choice goes a bit past that limit. Because the new tires are quite different in size, your car might feel a bit slower to accelerate, and it could confuse your anti-lock brakes (ABS). You might also need to raise your car a little bit or trim the fenders so the tires fit safely.

Because the new tires are a different size, they will spin at a slightly different speed. When your dashboard says you are driving 60 mph, you will actually be going 51.9 mph. Also, when you are cruising on the highway, your engine will run about 16% higher (more RPM) than it used to. It's a good idea to keep this in mind so you don't accidentally get a speeding ticket!

Now, let's talk about how the car will look. Your new wheels will sit nicely tucked inside the fenders, just like a standard factory car. As long as you have enough room on the inside near the suspension, you will enjoy a smooth, comfortable ride without worrying about the tires hitting the outside of the car.

Finally, looking at how the tire fits on the wheel: you have chosen a "Square" or ideal fitment. The tire width perfectly matches the wheel width. This is the best choice for everyday driving because it protects your wheels from curbs and gives you the safest, most comfortable grip on the road.