DE Racing Phenom Tire Bands No Prep RC.  These are tire bands for DE racing phenom tires. Reduce your E/T with better traction.  Speed Secret for your NO PREP Racing application. Drastically reduces/eliminates ballooning, stretching and blown foam. Increased tire consistency and car control. Double your contact patch, double your tire life. Our liners are thicker than most of our competition at less than half the price. Each liner is made specific to each style of no prep tire, so check out our other listings. Other competitors claim one fits most, but we have fitted each one of our liners to the specific tire. We have purchased each style and tested them with our liners. If you have any questions please feel free to message me.