255/55R19 vs 245/60R19
245/60R19 is taller than 255/55R19 by 1.77% — a diameter difference of 0.53″.
What changes between 255/55R19 and 245/60R19
Switching from 255/55R19 to 245/60R19 changes overall diameter by +1.77%, a taller tire by 0.53 inches. This lands inside the ±3% fitment safe zone, so most vehicles will accept the swap without rubbing, speedometer recalibration, or ABS/TPMS complications. Section width moves by -0.39″ (255mm → 245mm), which affects contact patch and fender-well clearance. Sidewall height shifts by +0.27″: a taller sidewall softens ride quality and adds off-road bump protection, with some loss of steering crispness. Revs per mile moves by -11, which translates directly to speedometer error — at an indicated 65 mph, actual speed becomes 66.2 mph. Both sizes share the same 19″ rim, so no wheel change is required — this is a pure tire-only swap.
| Spec | 255/55R19 | 245/60R19 |
|---|---|---|
| Overall diameter | 30.04″ | 30.57″ |
| Section width | 10.04″ (255 mm) | 9.65″ (245 mm) |
| Sidewall height | 5.52″ (55%) | 5.79″ (60%) |
| Rim diameter | 19″ | 19″ |
| Circumference | 94.38″ | 96.05″ |
| Revs per mile | 671 | 660 |
Interactive comparison
275/65R18 or "33" for inch aliases255/55R19
- Diameter
- 30.04″ / 763.1mm
- Section Width
- 10.04″
- Sidewall
- 5.52″ / 140.25mm
- Circumference
- 94.38″
- Revs/Mile
- 671
245/60R19
- Diameter
- 30.57″ / 776.6mm
- Section Width
- 9.65″
- Sidewall
- 5.79″ / 147mm
- Circumference
- 96.05″
- Revs/Mile
- 660
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 61.06 mph (98.27 km/h). Your speedometer reads 1.77% low versus actual speed.