245/75R16 vs 275/70R16
275/70R16 is taller than 245/75R16 by 2.26% — a diameter difference of 0.69″.
What changes between 245/75R16 and 275/70R16
Switching from 245/75R16 to 275/70R16 changes overall diameter by +2.26%, a taller tire by 0.69 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 +1.18″ (245mm → 275mm), which affects contact patch and fender-well clearance. Sidewall height shifts by +0.35″: a taller sidewall softens ride quality and adds off-road bump protection, with some loss of steering crispness. Revs per mile moves by -15, which translates directly to speedometer error — at an indicated 65 mph, actual speed becomes 66.5 mph. Both sizes share the same 16″ rim, so no wheel change is required — this is a pure tire-only swap.
| Spec | 245/75R16 | 275/70R16 |
|---|---|---|
| Overall diameter | 30.47″ | 31.16″ |
| Section width | 9.65″ (245 mm) | 10.83″ (275 mm) |
| Sidewall height | 7.23″ (75%) | 7.58″ (70%) |
| Rim diameter | 16″ | 16″ |
| Circumference | 95.72″ | 97.88″ |
| Revs per mile | 662 | 647 |
Interactive comparison
275/65R18 or "33" for inch aliases245/75R16
- Diameter
- 30.47″ / 773.9mm
- Section Width
- 9.65″
- Sidewall
- 7.23″ / 183.75mm
- Circumference
- 95.72″
- Revs/Mile
- 662
275/70R16
- Diameter
- 31.16″ / 791.4mm
- Section Width
- 10.83″
- Sidewall
- 7.58″ / 192.5mm
- Circumference
- 97.88″
- Revs/Mile
- 647
Speedometer & Diameter Impact
Wider tire — verify wheel widthAt an indicated 60 mph, your actual speed is 61.36 mph (98.74 km/h). Your speedometer reads 2.26% low versus actual speed.