NRG Carbon Fiber Steering Wheel (320mm) Flat Bottom w Shiny Black NRG ST 310CFBS 315mm Carbon Fiber Steering Wheel Black Spoke NRG Steering Wheel Carbon Fiber 3 Spoke Center (320mm) Flat Bottom NRG Carbon Fiber Series Steering Wheels Nrg Full Carbon Fiber Steering Wheel 350mm 1.5 Deep Dish With Carbon. Featuring a flat bottom Carbon Fiber construction, the 009 series offers the utmost maneuverability and free space when compared with circular wheels of a similar diameter. When paired with our Quick Release, this wheel becomes one of the most nimble and functional set ups available. NRG Innovations Products are designed for off road use only. Keep it on the track.