The new tire changes overall diameter by -9.62%. With a speedometer calibrated to the original tire, that same percentage is how far the speedometer and odometer read off — a taller tire means your true speed is higher than indicated and the odometer under-counts distance.
| Speedo shows | True speed | Speedo shows | True speed |
|---|---|---|---|
| 40 km/h | 36.2 km/h | 25 mph | 22 mph |
| 60 km/h | 54.2 km/h | 37 mph | 34 mph |
| 80 km/h | 72.3 km/h | 50 mph | 45 mph |
| 100 km/h | 90.4 km/h | 62 mph | 56 mph |
| 120 km/h | 108.5 km/h | 75 mph | 67 mph |
Commonly compared with 295/35R21
- 295/35R21 vs 255/45R20 · 255/45R20 specs
- 295/35R21 vs 295/40R20 · 295/40R20 specs
- 295/35R21 vs 245/45R20 · 245/45R20 specs
- 295/35R21 vs 275/40R20 · 275/40R20 specs
- 295/35R21 vs 245/50R20 · 245/50R20 specs
- 295/35R21 vs 275/45R20 · 275/45R20 specs
- 295/35R21 vs 285/35R22 · 285/35R22 specs
- 295/35R21 vs 265/40R20 · 265/40R20 specs
FAQ
What is the overall diameter of a 295/35R21 tire?
A 295/35R21 tire has an overall diameter of about 29.13 inches (740 mm) and a section width of 295 mm.
What sizes can replace a 295/35R21 tire?
Sizes within about ±3% of 295/35R21's 29.1-inch diameter are the closest matches, such as 255/45R20, 295/40R20, 245/45R20. Use the calculator above to check the exact speedometer effect of any substitute.
Fitment & trouble codes
Changing tire size by more than about 3% shifts the speedometer, odometer and, on some vehicles, ABS/traction calibration — which can set wheel-speed-sensor or vehicle-speed codes. See C1234 (wheel speed sensor) and C0050 (rear wheel speed) if a warning light appears after a size change.