Aftermarket Tire & Wheel Sizes
| Halibrand Engineering researched the Mustang wheel/tire sizing issue. |
| For optimum results, they suggest living within the parameters of |
| '65 - '66 MUSTANG WHEEL/TIRE FITMENT |
| Wheel Size | Correct Backspace | Suggested Tire Size |
| 15x6 | 4.000 in | P215/70R15 |
| 15x7 | 4.250 in | P225/60R15 |
| 15x8 | 4.500 in (rear only) | P255/60R15 to P235/60R15 |
| 16x7 | 4.250 in | P205/55R16 to P255/60R16 |
| 16x8 | 4.500 in (rear only) | P225/50R16 |
| 17x7 | 4.250 in | P205/50ZR17 |
| 17x8 | 4.500 in (rear only) | P235/45ZR17 |
| 18x7 | 4.250 in | P225/40ZR18 |
| 18x8 | 4.500 in (rear only) | P245/40ZR18 to P265/35ZR18 |
| '67 - '70 MUSTANG WHEEL/TIRE FITMENT |
| Wheel Size | Correct Backspace | Suggested Tire Size |
| 15x6 | 4.000 in | P215/70R15 |
| 15x7 | 4.250 in | P225/60R15 |
| 15x8 | 4.500 in | P225/60R15 |
| 15x9 ('69-'70 only) | 5.500 in | P235/60R15 |
| 16x7 | 4.250 in | P205/55R16 to P225/50R16 |
| 16x8 | 4.500 in | P225/50R16 to P255/50R16 |
| 17x7 | 4.250 in | P205/50ZR17 |
| 17x8 | 4.500 in | P235/45ZR17 to P245/45ZR17 |
| 17x9 | 5.500 in | P245/40ZR17 to P275/40ZR17 |
| 18x7 | 4.250 in | P225/40ZR18 |
| 18x8 | 4.500 in | P245/40ZR18 to P265/35ZR18 |
| 18x9 ('69-'70 only) | 5.500 in | P245/40ZR18 to P265/35ZR18 |