The following information is from the Konig website
"ULTRAFORM AT A GLANCE...
The Ultraform is a lightweight, 7-spoke design that has been developed for strength on the track while offering a modern and aggressive look when rolling around town. The Ultraform’s design lends to efficient brake cooling as well as exceptional brake caliper clearance. With widths up to 10.5″ wide, toughening up the stance on many rear wheel drive vehicles is an easy task. Constructed with Flow Forming Technology, the Ultraform is light, strong and contains more elongation and shock resistance than a traditional cast design. The Ultraform is offered in 17×8″, 17×9″, 18×8, 18×8.5″, 18×9″, 18×9.5″, 18×10.5″, 19×8.5″, 19×9″, 19×9.5″, 19×10.5″ and finished in Gloss Graphite or Gold."
What is Flow Forming?
Flow Forming Technology involves the application of pressure to the inner barrel of the wheel, while spinning & after it has been casted. This process shares similarities to that found in the forging process in which the aluminum molecules are compressed resulting in a lighter & stronger wheel with greater shock resistance & elongation properties.
Info & generic photos are from Konig's website, sizing affects the look of the wheel.