I’m running 215/70 R15 on the front and 235/75 R15 on the rear. Got them at Discount Tires (US). They matched Amazon on price. Also check tire rack.com.

https://m.tirerack.com/tires/TireSearchResults.jsp?zip-code=37179&width=215/&ratio=70&diameter=15&rearWidth=255/&rearRatio=40&rearDiameter=17#0

https://m.tirerack.com/tires/TireSearchResults.jsp?filtered=true&width=235%2F&r atio=75&diameter=15#0

 

Thank you for your input. I think my last F1 ran that combination also.