I think they are strapped around the wheel and because the OEM wheels are 16's they wouldn't fit on a bigger wheel size. At least that is what Tire Rack says.The sensor is clamped around the OE wheel and should be interchangeable. Did you have new sensors put on your new wheels?
TPMS is here and here to stay. Ford is actually using a lot better design than anyone else who is using the sensor bolted to the valve stem. a 17" Mustang sensor set up would also work if you did the sensor relearn procedure.sensors on wheels???? wtf...thanks for the warning to stay away from the 08's LOL