SP forged wheels are constructed from T6-6061 aerospace & medical-grade aluminium. Each design is carefully thought through and engineered by our team in Munich, Germany. The SP Four is a unique multi-spoke design for our forged wheels, a two-piece SP Four allowing for a truly unique custom wheel. Made from high-quality T6061 aluminium. SP FOUR specification: Wheel type - 2-piece forged Material - T6-6061 Aluminium Finish options - Brushed, Gloss, Matte, Polished Barrel/Lip finish options - Brushed, Gloss, Matte, Polished, Chrome Plated Barrel/Lip colour options - See our colour options here Colour options - See our colour options here Hardware Type - Stainless Steel, Titanium Hardware Colour - Chrome, Black, Gold, Raw Titanium Lead time - 3-8 weeks If you require custom specifications which we do not list, please get in touch with our team.