Forged aluminum wheels offer the significant strength to weight advantage over any cast aluminum wheel. Otto Fuchs starts with a 95% aluminum forging alloy. In the first forging stage, the blank is forged into a rotationally symmetric piece under a force of 4,000 tons. In the second forming stage, the styling is pressed into the pre-forged blank in a 7,000 ton press, which largely gives the wheel its later appearance. In the last forging stage with 800 tones of press force, the ventilation holes and the hub are stamped out, and the burring of excess material around the circumference cut off. After forging is complete the barrel of the wheel is made using flow-forming. The outer edge of the wheel is heated, then the complete rim area, from the outer to the inner flange, is rolled out. The finishing takes place in the last step: turning, drilling and deburring. The complex process is rounded off by painting
Here's why they are sought after and why they are expensive. It's over $1k CAD for a new one in 16x8" https://www.youtube.com/watch?v=_uOkI3MqBGc&feature=emb_logoQuoteForged aluminum wheels offer the significant strength to weight advantage over any cast aluminum wheel. Otto Fuchs starts with a 95% aluminum forging alloy. In the first forging stage, the blank is forged into a rotationally symmetric piece under a force of 4,000 tons. In the second forming stage, the styling is pressed into the pre-forged blank in a 7,000 ton press, which largely gives the wheel its later appearance. In the last forging stage with 800 tones of press force, the ventilation holes and the hub are stamped out, and the burring of excess material around the circumference cut off. After forging is complete the barrel of the wheel is made using flow-forming. The outer edge of the wheel is heated, then the complete rim area, from the outer to the inner flange, is rolled out. The finishing takes place in the last step: turning, drilling and deburring. The complex process is rounded off by painting