I bought a 2007 Ford Edge SEL Plus AWD with 200k miles (I am now fourth owner). It now needs new tires and I plan to keep the vehicle for a few more years (as long as it keeps going). I might put on 3k miles per year. It has P245/60R18 stock size tires on it now with what appears to be the stock rims. I have four used P235/60R18 Cooper Discover SRX tires from a previously vehicle with probably 25k miles left on them. I do not know rim width of existing rims. Can I put these used P235/60R18 size tires on the existing rims? Besides the speedometer difference, is there any fitment, rim width, safety, driveability, etc concerns that I should not put these size/smaller tires on? I couldn't find much out there on going "down in tire size" on the Edge, so any input would be appreciated. Thanks.