195/65R15 vs 205/65R15
205/65R15 is taller than 195/65R15 by 2.05% — a diameter difference of 0.51″.
What changes between 195/65R15 and 205/65R15
Switching from 195/65R15 to 205/65R15 changes overall diameter by +2.05%, a taller tire by 0.51 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″ (195mm → 205mm), which affects contact patch and fender-well clearance. Sidewall height shifts by +0.26″: 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 66.3 mph. Both sizes share the same 15″ rim, so no wheel change is required — this is a pure tire-only swap.
| Spec | 195/65R15 | 205/65R15 |
|---|---|---|
| Overall diameter | 24.98″ | 25.49″ |
| Section width | 7.68″ (195 mm) | 8.07″ (205 mm) |
| Sidewall height | 4.99″ (65%) | 5.25″ (65%) |
| Rim diameter | 15″ | 15″ |
| Circumference | 78.48″ | 80.09″ |
| Revs per mile | 807 | 791 |
Interactive comparison
275/65R18 or "33" for inch aliases195/65R15
- Diameter
- 24.98″ / 634.5mm
- Section Width
- 7.68″
- Sidewall
- 4.99″ / 126.75mm
- Circumference
- 78.48″
- Revs/Mile
- 807
205/65R15
- Diameter
- 25.49″ / 647.5mm
- Section Width
- 8.07″
- Sidewall
- 5.25″ / 133.25mm
- Circumference
- 80.09″
- Revs/Mile
- 791
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 61.23 mph (98.54 km/h). Your speedometer reads 2.05% low versus actual speed.