To create the perfect rotor there needs to be a balance of available friction surface combined with a certain area allocated to slots. Too many slots will leave less friction surface, therefore reducing brake efficiency. This often causes an excess of pad resin deposits across the friction surface which if left to buildup can lead to 'hot spots'. Resin build-up from the brake pads can become so severe that it can cause brake shudder, pedal pulsation and severe vibration through the steering wheel. It most cases these symptoms are mistaken for DTV, rotor runout, or a warped disc.
Sparta's engineers have studied the negative effects of pad resin build up on the rotor face and how it impacts the braking system as a whole. These studies paired with FEA analysis led to the creation of our patented TW3 (Thermal Window 3) slot design.
By machining our TW3 slot pattern into the face of the rotor, the pad resin spreads more evenly across the friction surface, reducing the chances of hot spots and pad deposits. To further minimize rotor stress, the TW3 slots start and end over the support pillars in our patented DCF96 vent pattern, preventing excessive material thickness variations that leads to cracking when subjected to excessive heat and cooling cycles.