205/60R15 vs 205/65R15 at a glance
| Measure | 205/60R15 (current) | 205/65R15 (new) | Difference |
|---|---|---|---|
| Overall height | 24.69 in | 25.49 in | +0.81 in (+3.27%) |
| Width | 8.07 in (205 mm) | 8.07 in (205 mm) | +0 mm |
| Sidewall | 4.84 in | 5.25 in | +0.40 in |
| Wheel | 15 in | 15 in | +0 in |
| Circumference | 77.6 in | 80.1 in | +2.5 in |
| Revs per mile | 817.0 | 791.2 | −25.9 |
Verdict: check clearance and speedometer
Over 3% and up to 5%: worth checking clearance, the speedometer and gearing before you buy. Going from 205/60R15 to 205/65R15 is a 3.3% increase in overall height (+0.81 in), and the vehicle sits about 0.40 in higher. The tire is the same width. The 3% rule of thumb comes from Discount Tire and 1010tires; it is not a guarantee of fit.
True speed and odometer
| Speedometer shows | You are really doing | Difference |
|---|---|---|
| 35 mph | 36.1 mph | +1.1 mph |
| 45 mph | 46.5 mph | +1.5 mph |
| 55 mph | 56.8 mph | +1.8 mph |
| 60 mph | 62.0 mph | +2.0 mph |
| 65 mph | 67.1 mph | +2.1 mph |
| 70 mph | 72.3 mph | +2.3 mph |
| 75 mph | 77.5 mph | +2.5 mph |
Odometer: 1,000 indicated miles is 1,033 real miles, and 10,000 is 10,327.
The math
205/60R15: 15 + 2 × (205 × 60% ÷ 25.4) = 24.69 in. 205/65R15: 15 + 2 × (205 × 65% ÷ 25.4) = 25.49 in. Change = 25.49 ÷ 24.69 − 1 = +3.27%. True speed at 60 = 60 × 25.49 ÷ 24.69 = 61.96 mph.
Check next
- Regear and RPM at cruise for this swap
- Speedometer and odometer correction
- Other sizes within ±3% of 205/60R15
Calculated from the size alone. Real tires vary a little by brand and model, and the loaded radius is a bit smaller. Confirm the wheel width range, clearance, load index and speed rating for your vehicle. See how to read a tire size, the load index chart and the speed rating chart.
Size pages: 205/60R15 · 205/65R15. More swaps: all tire size comparisons.