Our newest Advanced Rim Technology (A.R.T) combines monoblock cast wheel technology with a spin forming technology to drastically improve the material property and strength of our wheels. The A.R.T process impacts the micro structure of aluminum by utilizing three hydraulic rollers to apply pressure to form the inner rim area. The rollers move down the barrel applying pressure to compress, stretch, and form the entire wheel barrel producing optimal weight savings while improving material strength. This process actually alters the grain of the aluminum to produce a wheel barrel that is significantly lighter with enhanced strength comparable to fully forged wheels. A.R.T helps reduce the weight up to 25% when compared to a standard cast wheel through this finer and more even aluminum structure. M615 weights for 20” sizes start at 23 lbs/wheel.