265/30R19 vs 235/35R19
235/35R19 is taller than 265/30R19 by 0.86% — a diameter difference of 0.22″.
What changes between 265/30R19 and 235/35R19
Switching from 265/30R19 to 235/35R19 changes overall diameter by +0.86%, a taller tire by 0.22 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″ (265mm → 235mm), which affects contact patch and fender-well clearance. Sidewall height shifts by +0.11″: a taller sidewall softens ride quality and adds off-road bump protection, with some loss of steering crispness. Revs per mile moves by -6, which translates directly to speedometer error — at an indicated 65 mph, actual speed becomes 65.6 mph. Both sizes share the same 19″ rim, so no wheel change is required — this is a pure tire-only swap.
| Spec | 265/30R19 | 235/35R19 |
|---|---|---|
| Overall diameter | 25.26″ | 25.48″ |
| Section width | 10.43″ (265 mm) | 9.25″ (235 mm) |
| Sidewall height | 3.13″ (30%) | 3.24″ (35%) |
| Rim diameter | 19″ | 19″ |
| Circumference | 79.36″ | 80.04″ |
| Revs per mile | 798 | 792 |
Interactive comparison
275/65R18 or "33" for inch aliases265/30R19
- Diameter
- 25.26″ / 641.6mm
- Section Width
- 10.43″
- Sidewall
- 3.13″ / 79.5mm
- Circumference
- 79.36″
- Revs/Mile
- 798
235/35R19
- Diameter
- 25.48″ / 647.1mm
- Section Width
- 9.25″
- Sidewall
- 3.24″ / 82.25mm
- Circumference
- 80.04″
- Revs/Mile
- 792
Speedometer & Diameter Impact
Narrower tire — verify wheel widthAt an indicated 60 mph, your actual speed is 60.51 mph (97.39 km/h). Your speedometer reads 0.86% low versus actual speed.