Super Blue, you like that tire combo? Just wondering, my ride needs some new shoes
That's the combo I used just because I just so happened to have those size tires lying around. I think that if I stick with 14" rims I would stay with this combo, only to keep the factory Magnum 500 rims though. I also have a set of slotted 14" rims I might swap the tires onto but the slotted rims are wider so technically I could fit a wider tire. 15" slotted rims are nice but harder to find at areasonable price. Also the 14" look good with some meat on them.
The deal is with the 14" rims is that they are only like 6" wide I think for the Magnum 500s so not only the rim diameter limits what size tire you can fit but also the rim width. I think I could safely fit a 235/60-14 but it would be slightly shorter and wider, which is ok and might aid acceleration a tad, but as mentioned I had these tires lying around so I just used what I had.
Keep in mind that the 15" tires (for the same type tire) will probably handle better than the 14" tires as they will have less side wall deflection.
My car is not on the road but I took it around the block on the 14" Magnums and it wallowed in the corners.