Measuring Your Wheels for Big Brake Kit and Caliper Clearance by Accesspeed
Q: Will this big brake kit or caliper kit fit with my wheels?
A: It is very easy to measure your wheels using the Accesspeed Wheel Clearance Diagram Image shown with each big brake kit from Accesspeed. Find the brake kit(s) you want on the Accesspeed website. Each brake kit product description includes photos on the wheel caliper clearance measurements. Those images show you the measurements you will need. See Image Example 1 below.
Image Example 1:

With that information, you just need to find the distance from the front face of the rotor outward toward the back of the wheel that mates against the rotor. If all four (4) wheels are the same size, all you need for most wheels is a 10-12" straight-edge and a ruler or tape measure, and it is easy to figure out by removing one of your wheels. First, remove your wheel and lay the wheel on the ground with the back side of the wheel facing up. (Accesspeed suggests laying a towel or blanket down to protect the outside of your wheel.) Then, you will lay the straight edge across the center of the wheel surface that mounts against the rotor. (See attached Image Example 2 showing how to use 2 rulers, if you have them.) Using the front and rear schematics as guides, measure outward from the center along the straight edge until you have the area in which the caliper will mount. We suggest measuring the area that shows the bottom of the caliper, as well as measuring the area that shows the top of the caliper. This allows you to document how far into the back of the wheel the caliper will protrude (if at all), as well as the outside diameter of the caliper. Once you have those numbers, you should be able to refer to the Accesspeed Wheel Clearance Diagram Image to compare notes. This helpful hint from Accesspeed will let you know if your wheels are a direct bolt-on fit, or if you will need spacers, or even aftermarket wheels.
Image Example 2:
