Beyern Spartan BMW wheels by Beyern, One look at the Spartan’s will telegraph that these are the wheels that represent the perfect complement to the Ultimate Driving Machine. The Spartans eight bold U-shaped spokes strike a pose in perfect harmony with the essence of BMW. Beyond beauty, the Spartan model is a paradigm of performance. It is a one-piece wheel manufactured using an advanced technology termed rotary-forging.
The Spartan Rotary Forged® Wheel is manufactured using a highly advanced production technique called Rotary Forging. The rim of the wheels is forged at high pressure while the wheel is spun at high speed. This alters the molecular structure and enhances the strength of the alloy. The benefit is a much lighter weight than a regular cast wheel. Most importantly, the weight saving is in the outer rim of the wheel which dramatically reduces rotational mass and enhances vehicle performance.