Are 15 inch wheels any better than fourteen inch wheels?
Just for comparison
If Original F70-14 = 215/70R14
215/70R14 = 25.85" diameter, 8.4" wide
275/45-R17 = 25.67 diameter 10.8" wide
235/60-R15 =26.1" diameter 9.25" wide
275/50-R15 =25.83" Diameter 10.8" wide
275/45-R17 = 25.67 diameter 10.8" wide