The Sierra is offered in a 17×9 or a 20×9!The wheel is made byFlow Formed Aluminum Construction. After it has been casted,Flow Forming Technology appliespressure to the inner barrel of the wheel, while spinning. This process stretches and compresses the aluminum, which increases tensile strength by optimizing grain structure of the aluminum. The Sierra is available in a wide variety of bolt patterns and two offset options. Choose 4.50″ backspace (-13mm Offset) to push the wheel further out and 5″ backspace (0mm Offset) to bring the wheel closer into the steering knuckle. By having this higher offset wheel, your steering scrub radius willresult in better performance and longevity of components. We also enlarged the lug nut bore for better lug nut options and clearance. If unsure, please email or call with questions regarding backspace and bolt patterns. The Sierra offers you the option to run a true off-road beadlock clamping ring for race/extreme vehicle use or a “simulated” accent ring for your daily driver.Both of these rings are aForged 6061-T6 Constructionfor the ultimate combination of strength and lightweight. The weep holes on the inner section of the ring allow water and debris to escape after those water crossingsand car washes. The ring hardware is made up of (24) zinc yellow-chromate plated hex head screws, in Grade 8 steel, 3/8″-16 thread size, and 1-1/4″ long. Weve taken the extra time to drill and tap (48) redundant holes in the lip of the wheel for long term worry free use. The beadlock rings are counterbored to provide the best protection for your bolts. This wheel is offered in a standardBlack Satin Finish. This allows you to run the wheel as is, polished, or custom coating. Wheel Specs- Size: 17×9- Bolt Pattern: 5×5 | 6×5.5 | 8×6.5- Backspacing: 4.50- Offset: -13mm- Finish: Black Satin with Black Ring- Beadlock Ring: Slotted Flow Formed Aluminum Casting Forged6061-T6 Heat Treated Rings Dual Mounting Design – Available with Off-Road Use Beadlock Ring or Simulated Accent Ring Slotted Weep Holes WideSelection of Bolt Patterns (Email/Call for Custom Fitments) Extra Large Lug Nut Socket Clearance 24 Grade 8 Steel 3/8″-16 Thread, 1-1/4″ Length Hardware 48 Redundant Double Drilled and Tapped Beadlock Screw Holes Counterbored Beadlock Screw Holes in Ring Knurling Applied on Wheel Lip and Beadlock Ring Mating Surfaces 37lbs Many more bolt patterns available, if yours is not listed please email for custom options Designed and CNC Machined in Carson City Nevada, Casting Imported. Notes:** PLEASE ALLOW A LEAD TIME OF UP TO 2-3 WEEKS FOR PRODUCTION AND SHIPPING.