Just an FYI, those 20 wheels are standard on the R/T, just in a chrome version. To date, no SRT has been planned. The black wheel covers you see here are just for the test mules.
Sources familiar with Chrysler's current inner workings have statedWe caught this SRT-badged Dodge Nitro prototype running on the streets of downtown Detroit, causing us to wonder: Is a Nitro SRT8 really in Dodge's future? The undisguised Nitro was spotted pulling out of the famous Detroit Firehouse—the favorite Chrysler-sponsored hospitality spot for journalists covering the Detroit Auto Show. As the Nitro pulled into traffic and stopped at a red light, the SRT badge came into view, and we were able to get out our camera and start shooting just as the light turned green and the Nitro drove out of sight. Our view of this Nitro SRT8's nose was very fleeting, so we can't reliably comment on the prototype's front-end styling treatment. Overall, this Nitro doesn't seem to heavily modified.