275/40R22 vs 265/45R22
265/45R22 is taller than 275/40R22 by 2.38% — a diameter difference of 0.73″.
What changes between 275/40R22 and 265/45R22
Switching from 275/40R22 to 265/45R22 changes overall diameter by +2.38%, a taller tire by 0.73 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 -0.40″ (275mm → 265mm), which affects contact patch and fender-well clearance. Sidewall height shifts by +0.36″: 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 22″ rim, so no wheel change is required — this is a pure tire-only swap.
| Spec | 275/40R22 | 265/45R22 |
|---|---|---|
| Overall diameter | 30.66″ | 31.39″ |
| Section width | 10.83″ (275 mm) | 10.43″ (265 mm) |
| Sidewall height | 4.33″ (40%) | 4.69″ (45%) |
| Rim diameter | 22″ | 22″ |
| Circumference | 96.33″ | 98.61″ |
| Revs per mile | 658 | 643 |
Interactive comparison
275/65R18 or "33" for inch aliases275/40R22
- Diameter
- 30.66″ / 778.8mm
- Section Width
- 10.83″
- Sidewall
- 4.33″ / 110mm
- Circumference
- 96.33″
- Revs/Mile
- 658
265/45R22
- Diameter
- 31.39″ / 797.3mm
- Section Width
- 10.43″
- Sidewall
- 4.69″ / 119.25mm
- Circumference
- 98.61″
- Revs/Mile
- 643
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 61.43 mph (98.85 km/h). Your speedometer reads 2.38% low versus actual speed.