245/45R19 vs 295/40R19
295/40R19 is taller than 245/45R19 by 2.20% — a diameter difference of 0.61″.
What changes between 245/45R19 and 295/40R19
Switching from 245/45R19 to 295/40R19 changes overall diameter by +2.20%, a taller tire by 0.61 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 +1.96″ (245mm → 295mm), which affects contact patch and fender-well clearance. Sidewall height shifts by +0.31″: a taller sidewall softens ride quality and adds off-road bump protection, with some loss of steering crispness. Revs per mile moves by -16, which translates directly to speedometer error — at an indicated 65 mph, actual speed becomes 66.4 mph. Both sizes share the same 19″ rim, so no wheel change is required — this is a pure tire-only swap.
| Spec | 245/45R19 | 295/40R19 |
|---|---|---|
| Overall diameter | 27.68″ | 28.29″ |
| Section width | 9.65″ (245 mm) | 11.61″ (295 mm) |
| Sidewall height | 4.34″ (45%) | 4.65″ (40%) |
| Rim diameter | 19″ | 19″ |
| Circumference | 86.96″ | 88.88″ |
| Revs per mile | 729 | 713 |
Interactive comparison
275/65R18 or "33" for inch aliases245/45R19
- Diameter
- 27.68″ / 703.1mm
- Section Width
- 9.65″
- Sidewall
- 4.34″ / 110.25mm
- Circumference
- 86.96″
- Revs/Mile
- 729
295/40R19
- Diameter
- 28.29″ / 718.6mm
- Section Width
- 11.61″
- Sidewall
- 4.65″ / 118mm
- Circumference
- 88.88″
- Revs/Mile
- 713
Speedometer & Diameter Impact
Wider tire — verify wheel widthAt an indicated 60 mph, your actual speed is 61.32 mph (98.69 km/h). Your speedometer reads 2.20% low versus actual speed.