The S624 EFT is a premium free-rolling position trailertire for on highway applications. The tread pattern features a decoupling groove to resist irregular wear. The rib pattern promotes long even wear and low rolling resistance. The S624 EFT utilizes new Advanced Compound Technology tread compound. Advanced Compound Technology is produced by mixing in a fluid state forthe best compound dispersion The benefit of Advanced Compound Technology is maximized mileage, wet traction and rolling resistance without compromise