How do you know when its time to replace your rotors?

Rotors are a very important part of your vehicle's braking system.  There are several things to look out for when inspecting them. As everyone knows the stock rotors for most Lotus Elise and Exige base models are the same rotor for all corners. This means the cross drilling is machined and the vanes are in the wrong direction on one side of the car.

When looking at your rotors the this to look for are:

1. Thickness, minimum thickness for standard brake discs is 24.9mm

• When checking thickness be sure to use a brake rotor micrometer or caliper. They have a point that allows you to check thickness as well as depth of any scoring on the rotor.

     2. Scoring or grooving, some may be normal but as a general rule they should be smooth

     3. Cracking or heat checking. This can happen if you are using your car on the track and are using any heavy braking. Small minor heat checking is normal but should be monitored. If you find any cracks that extend to the outer perimeter of your rotor, that rotor should be replaced.