What would be good tires sizes for my 69 Cougar…I am looking for a set of Magnum 500’s, and when I get them I will need help to determine tire sizing. The 351 has been significantly upgraded, along with a 410 posi, so I’m thinking I need the widest 60 series that will comfortably fit in the rear. With that, 70’s in the front would be appropriate, but what size? Thanks in advance.
For whatever it’s worth, here’s what 215/70/15s and 255/60/15s look like on my '69. With correct backspacing, 275/60/15s will clear on the back, but they’re tight.
What back space do you have on the rear wheels with the 15X8 255/60R 15
Is it 4.25 or larger?
Thanks,
Bill
Here are pictures of both my 69 Cougars with the same Magnum 500 rim/tire combination. Fronts are 15x7" 4.25" back space w/ BF Goodrich Radial TA 235/60 15" tires. Rears are 15x8" 4.50" back space w/ BF Goodrich Radial TA 245/60 15". The fronts just clear the upper ball joint with no fender rubbing. The rears fit perfectly.
