Tire manufacturers do not warranty their tires against flat spotting and FlatStoppers have consistently been the go-to product to save dollars by saving the tires. The special concave design of the FlatStoppers effectively cradles the tire while the durable exterior coating prevents scooting on even the smoothest of floors including epoxy and plastic modular flooring. Additionally, the FlatStopper will not leave marks on floors. Through its composition, Race Ramps' FlatStoppers provide the highest quality and performance of any flat spot prevention product in the market today. The Supercar FlatStopper accommodates tires up to 14-inches wide, which has become more of today's standard in new factory performance vehicles. The Supercar FlatStopper measures 16"W x 28"L and is an addition to Race Ramps' successful line of FlatStoppers which includes the standard FlatStoppers (for tires up to 12-inches wide) and the 10-inch FlatStoppers (for tires up to 8-inches wide). Save dollars by saving your tires.