TJIN EDITION CHEVROLET SONIC
Tjin Edition, Unique Fabrication and LR Autobody partnered with GM to also build a motorsports-themed Sonic for SEMA. Tjin designed this one-of-a-kind sedan, LR Autobody was responsible for the paint work, and Unique Fabrication handled the fabrication of the custom roll cage and the overall build. The Tjin Edition Sonic features tons of carbon fiber goodies by DownForce, Forgestar wheels, Falken Tires, Pedders suspension, Baer brakes, a MagnaFlow exhaust, Vibrant Performance/Unique Fabrication intercooler kit, GlowShift gauges, and custom Light WurkZ LED headlights.
Taken from Neil Tjin's SEMA Blog. Not a street car. I'd say you are correct in your assessment. I have seen the rim/tire size for this car but at the moment can't find it.
Laborsmith