These are a forged one piece aluminium wheel. They are made from the finest aircraft grade 6061 aluminium. The wheels are made by a process called hot forging.  A solid piece of aluminium billet is heated and is shaped applying compressive force from a press. 

The 1st forging process is performed with a pressure of 5,000 kg’s per cm². In the 2nd forging process 3,500 kg’s are applied per cm². The lip is also forged to 3,500 kilograms per cm². Forging refines the grain structure andimproves the physical properties of the metal. With the advanced RAYS design process the grain flow can be oriented in the direction of principal stresses encountered in actual use. 

Features

• 8 and 10-spoke designs offers maximum strength
• Forged construction provides peace of mind on the road or the track
• Able to be fitted on a wide range of JDM cars
• 8 spoke design is available for 14" to 16" rims, and 10 spoke design is available for 15" to 19" rims
• Sizes (dia.Xwidth): 14X5.0/5.5/6.0/6.5; 15X5.5/6.0/6.5/7.0; 16X6.0/6.5/7.0/7.5/8.0/8.5; 17X7.5/8.0/8.5/9.0/9.5/10.0; 18X7.5/8.0/8.5/9.0/9.5/10.5; 19X8.0/8.5/9.5/10.5