+3.88%Borderline — noticeable speedometer/odometer error
Speedometer error
With a speedometer calibrated to 245/75R16, fitting 265/75R16 makes it read as follows:
| Speedo shows | True speed | Speedo shows | True speed |
|---|---|---|---|
| 40 km/h | 41.6 km/h | 25 mph | 26 mph |
| 60 km/h | 62.3 km/h | 37 mph | 39 mph |
| 80 km/h | 83.1 km/h | 50 mph | 52 mph |
| 100 km/h | 103.9 km/h | 62 mph | 65 mph |
| 120 km/h | 124.7 km/h | 75 mph | 77 mph |
Full comparison
245/75R16
Overall diameter773.9 mm · 30.47 in
Section width245 mm · 9.65 in
Sidewall height183.8 mm · 7.23 in
Circumference2431.3 mm · 95.7 in
Revolutions per mile662
Revolutions per km411
265/75R16
Overall diameter803.9 mm · 31.65 in
Section width265 mm · 10.43 in
Sidewall height198.8 mm · 7.82 in
Circumference2525.5 mm · 99.4 in
Revolutions per mile637
Revolutions per km396
+3.88%Borderline — noticeable speedometer/odometer error
Original
Overall diameter773.9 mm · 30.47 in
Sidewall height183.8 mm
Circumference2,431.3 mm
Revolutions / mile661.9
New
Overall diameter803.9 mm · 31.65 in
Sidewall height198.8 mm
Circumference2,525.5 mm
Revolutions / mile637.2
Speedometer & odometer error
The new tire changes overall diameter by +3.88%. 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 | 41.6 km/h | 25 mph | 26 mph |
| 60 km/h | 62.3 km/h | 37 mph | 39 mph |
| 80 km/h | 83.1 km/h | 50 mph | 52 mph |
| 100 km/h | 103.9 km/h | 62 mph | 65 mph |
| 120 km/h | 124.7 km/h | 75 mph | 77 mph |
See individual specs: 245/75R16 · 265/75R16. A change this size can affect ABS/speed calibration — see wheel-speed codes if a light appears.