1. Make sure the disc code number corresponds to the vehicle on which it will be installed.

2. Always replace both discs on each axle at the same time.

3. Read and scrupulously follow the instructions for disc replacement.

4. Replace discs the moment they show signs of deep grooves, uneven wear or when they reach their minimum thickness.

5. Minimum thickness is indicated on every disc (for instance, MIN. TH 37 mm indicates a minimum thickness of 37 mm). This value is also given in the Brembo catalogue. Generally speaking a brake disc will wear down over the period of 2-3 pad changes.

6. Carefully clean discs before installation. Check that there are no traces of oil or grease on the braking surfaces. This could negatively affect braking performance.

7. Once the disc is fitted, check it with a run-out gauge attached to the suspension arm. Measure disc run-out on the outside section of the braking surface. After one complete turn of the wheel the run-out value must not exceed 0.12 mm. If the value is greater, change the position of the disc with respect to the wheel hub (if the positioning holes allow this) or fit the second disc. Disc run-out measurement is a very important operation. If run-out is excessive, over time and after a few thousand kilometres the disc may show abnormal wear, even in the absence of braking action (caused by partial contact with the pads), and vibrations may be felt when braking. The maximum run-out tolerance indicated by Brembo has been determined on the basis of our experience. Some commercial vehicle manufacturers may indicate slightly different values. In such cases, the value indicated by the latter should be used.

8. Adopt a brief running-in period for new discs (about 500 km). During this period braking should be regular and smooth to allow the disc and pads to bed in correctly. Over sharp or too prolonged a braking action could cause the pad friction material and disc to overheat, with the risk of compromising brake performance over the long term.

9. Discs and pads are important sources of information (state of surfaces, colour, appearance). Any change in their condition could indicate breakage or wear of one or more components on the axle (calipers, hub, bearings, etc.).