Even stock, without any customizations or add-ons, this is a breathtaking bike. Vivid Black meets a blacked-out engine, blacked-out trim, blacked-out exhaust. That's stock. We've taken it a step further by giving it the Knockout Custom Wheel Kit with a 21" front and 18" rear wheel. We've also added Turbine Floating Brake Rotors and adjusted the suspension with new internal fork components for optimized fork travel and ride quality. CUSTOMIZATION TIP: If you get this bike, we recommend adding at least a Stage I upgrade!