Long Lasting, Warp-Resistant Brake Rotors StopTech has developed the StopTech Cryo cryogenically treated slotted rotors for drivers who want maximum durability from their brake rotors. Although not apparent to the naked eye, rotors treated cryogenically show significant improvements in longevity. Deep cryogenic processing creates dramatic increases in abrasive wear resistance and durability while also reducing residual stresses for an extra level of protection against warping. The rotors are also double disc ground and mill balanced to ensure a consistent friction surface and improved pad bed-in. Serious drivers - those who tend to cross the finish line first - take their edge where they can find it. And a growing number of them have embraced the edge that they've found in cryogenically treated brake rotors. Here's why: Rotors resist cracking, warping and fading. Rotors last 2-3 times longer. Fewer pads and rotors are needed. Rotors stop consistently and predictably.