Why won't this wheel fit my car?

Wednesday, May 19, 2010 by Logan Woodworth
We often get calls from consumers asking about installing larger wheels and tires on their car or truck. Plus sizing with larger custom wheels (rims) is very common and is the easiest way to improve the overall look of your vehicle.

The one thing that often gets forgotten is how the larger wheel fits on the vehicle. Many people look at similar cars with large wheels and assume that their car or truck can handle the same. The thing that they rarely see are modifications to the vehicle to accommodate the wheels. 
There are many fitment considerations when choosing the correct custom wheel including overall diameter, wheel width, tire width, offset, center bore, etc...

In short, bigger custom wheels and tires are a great way to enhance the look of your ride but there are many things to consider. Visit our website or contact us for advice prior to making a decision.

What is rim offset?

Tuesday, December 8, 2009 by Tire Rack Team
Rim offset, more accurately referred to as wheel offset, is the distance from the hub mounting surface to the centerline of the wheel. If this measurement isn't suited to the specific vehicle, the vehicle won't handle as it should. 

Wheel offset measurement is defined in three different ways. Zero offset occurs when the hub mounting surface is completely even with the centerline of the wheel. Positive offset means that the hub mounting surface is toward the front of the wheel, while negative offset means the surface is toward the back or brake side of the wheel.

When the width of the wheel changes, it also changes the offset. If the offset stays the same but width still increases, the width is split between the inside and outside—this obviously will not work, which is why we've tested the fit on thousands of different vehicles. We are fully prepared to help you find the proper wheel fitment. Search our wheels by vehicle, or contact one of our sales specialists.

Engineering: How it Applies to Shopping for Aftermarket Car Rims

Tuesday, November 17, 2009 by Tire Rack Team
You can pick a certain look for your vehicle and hope for a perfect fit when you buy aftermarket car rims (more accurately referred to as wheels) or you can use the "Shop by Vehicle" tool on our site. Here's why:

Though wheel size, offset and/or bolt pattern are all important, they alone cannot ensure an exact fit. To avoid vibration, wheel/tire interference and unbalanced handling, you'll need to measure a few other critical wheel components. At Tire Rack, we do this with sophisticated electronic tools so that our fitment engineers can get extremely accurate measurements. Vehicles are measured as well, enabling us to compare the two sets of numbers in order to determine precise fitments. (Read more.)

All you need to really know is that it helps us help you find the perfect wheels—just search by vehicle, and we'll show you.