WTRX-AM Flint, MI, USA Sports AM 1330 wtrxsports.com Mid Michigans Biggest Athletic Supporter Mid-Michigan Biggest Athletic Supporter. WTRX (1330 AM, "Sports XTRA 1330") is an American radio station broadcasting a sports format in Flint, Michigan. It is the Flint affiliate for Michigan Wolverines football and men's basketball, and Infinity Sports Network. WTRX's studios are located in Mundy Township near U.S. 23 and Hill Rd. and its transmitter is in Burton at 3076 East Bristol Road near Dort Hwy. Sister station WFBE also transmits from the WTRX facility.