How Do I Figure Out Wheel Offset?

How do you tell the offset of a tire?


Measure the distance from the floor to the straight edge and divide by two.

That calculates the centerline of the wheel.

If the centerline number is smaller than the hub measurement, offset is positive; if it is larger, offset is negative..

Are offset wheels bad?

Too much positive offset (the wheel sits too far in towards the car) can cause damage to inner suspension and brake components from the inside lip. This can lead to poor handling making the car unstable at speed. Sometimes the rubbing will happen on the inner sidewall of the tire causing a rupture of the tire.

Is ET positive or negative offset?

Most front wheel drive vehicles have positive ET wheels. Zero Offset wheels have their mounting face even with the center line of the wheel and are by definition “ET 0″. Negative Offset wheels have their mounting face toward the rear of the wheel – powerful rear-wheel drive cars often have wheels with negative offset.

How do you know if a rim will fit your car?

The two easiest ways are to check the sticker plate in your car, it should be located inside the driver side door, or look online for the vehicle specifications for your exact make and model. That should tell you the standard rim size.

Does positive offset stick out more?

Offset also has an effect on how much the wheel sticks out past your fender or goes inside the fender. The more positive offset you have the further the wheel is going to be in from the fender. The more negative offset you have the further the wheel is going to stick out.

How do you know what offset you need?

Wheel offset is one of the major determining factors on whether a wheel will fit your car or truck. As a general rule of thumb, most front wheel drive vehicles have a positive offset. If you want to put wider wheels on your vehicle than OEM, you generally need to reduce the offset.

Does offset matter buying wheels?

Most OEM wheels, and most wheels in general, will have a positive offset. … Negative offset is generally seen in very deep-dish or deep convex aftermarket wheels. The particular offset, therefore, determines how the wheel will sit in the car’s wheel well, and how much of the barrel will extend toward the suspension.

Do negative offset wheels stick out?

A negative offset gives an inset or deep-dish look: -44 is deeper than -12. The wheel will also stick out from the truck.

How far do offset rims stick out?

So if you put a +15mm offset wheel on the car, the wheel is likely to stick out about 1 inch. If you’ve ever noticed a lifted truck or a low rider with wheels sticking out, its because the offset of the rim is very low and in many cases so low that they are negative offsets.

Does wheel offset affect performance?

3. Looks: A smaller offset moves the wheels outward, so they have a tendency to fill out the wheel well better. Cars set up for show, more than performance will often choose a lower offset wheel, however, if the offset is too small the sidewall will rub the inside of the fender.