The footprint system was developed as Matter wheels understood that despite urethane durometers, there are other factors that affect the feel of the wheel to the skater.
The critical element affecting the feel is the footprint, the larger the footprint, the softer the wheel.Therefore, we believe its more important to measure the footprint of the wheel relative to the other wheels in a sequence. Matter uses an F - scale rating system. F0 being the hardest, F1 the next hardest, and so on. This footprint scale is relavent only to each individual family or sequence.

During the development of Hollow Core Technology, it became apparent that Hollow wasn’t the answer for ALL surfaces and all conditions. Clearly, there are certain styles of skating and certain terrains where additional flex is required to allow the skater to better manage energy. So, back to the lab Matter went and the end result is the two-piece, EMT flex technology. EMT has road and track applications and one will find the EMT option throughout the Matter line. All track wheels features EMT with convertible wheel technology.