_JD_ said:
Lotus has said that the wheels are forged on the order guide.
Possibly could be both.
FORGED: Material is placed under high pressure between tooling dies to conform to a shape.
CAST: Material is poured under gravity or low pressure into a mold.
SEMI-SOLID-FORGED: Material in a semi-liquid state is forced under higher pressure into a mold/die.
The advantage of the semi-solid forging is that using a semi-liquid means the tooling is a lot cheaper, closer to that of a cast rim. But the properties of the metal are similar to forging.
I don't know how the LSS rims are made, but if they use this process, they could be considered high-pressure molded and also forged.