275/55R22 vs 315/50R22
315/50R22 is taller than 275/55R22 by 1.45% — a diameter difference of 0.49″.
What changes between 275/55R22 and 315/50R22
Switching from 275/55R22 to 315/50R22 changes overall diameter by +1.45%, a taller tire by 0.49 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 +1.57″ (275mm → 315mm), which affects contact patch and fender-well clearance. Sidewall height shifts by +0.25″: a taller sidewall softens ride quality and adds off-road bump protection, with some loss of steering crispness. Revs per mile moves by -9, which translates directly to speedometer error — at an indicated 65 mph, actual speed becomes 65.9 mph. Both sizes share the same 22″ rim, so no wheel change is required — this is a pure tire-only swap.
| Spec | 275/55R22 | 315/50R22 |
|---|---|---|
| Overall diameter | 33.91″ | 34.4″ |
| Section width | 10.83″ (275 mm) | 12.4″ (315 mm) |
| Sidewall height | 5.95″ (55%) | 6.2″ (50%) |
| Rim diameter | 22″ | 22″ |
| Circumference | 106.53″ | 108.08″ |
| Revs per mile | 595 | 586 |
Interactive comparison
275/65R18 or "33" for inch aliases275/55R22
- Diameter
- 33.91″ / 861.3mm
- Section Width
- 10.83″
- Sidewall
- 5.95″ / 151.25mm
- Circumference
- 106.53″
- Revs/Mile
- 595
315/50R22
- Diameter
- 34.4″ / 873.8mm
- Section Width
- 12.4″
- Sidewall
- 6.2″ / 157.5mm
- Circumference
- 108.08″
- Revs/Mile
- 586
Speedometer & Diameter Impact
Wider tire — verify wheel widthAt an indicated 60 mph, your actual speed is 60.87 mph (97.96 km/h). Your speedometer reads 1.45% low versus actual speed.