Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-19 | 145/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.13 (714.6) | 26.85 (682) | -1.28 (-32.6) -4.6% |
| Width inches (mm) | 5.71 (145) | 5.71 (145) | 0 (0) 0% |
| Circum. inches (mm) | 88.39 (2244.98) | 84.35 (2142.57) | -4.03 (-102.42) -4.6% |
| Sidewall Height inches (mm) | 4.57 (116) | 3.43 (87) | -1.14 (-29) -25% |
| Revolutions per mile (km) | 716.86 (445.44) | 751.13 (466.73) | 34.27 (21.29) 4.8% |
145/60-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.09 mph (30.72 km/h) |
| 25 mph (40.23 km/h) | 23.86 mph (38.4 km/h) |
| 30 mph (48.28 km/h) | 28.63 mph (46.08 km/h) |
| 35 mph (56.33 km/h) | 33.4 mph (53.76 km/h) |
| 40 mph (64.37 km/h) | 38.18 mph (61.44 km/h) |
| 45 mph (72.42 km/h) | 42.95 mph (69.12 km/h) |
| 50 mph (80.47 km/h) | 47.72 mph (76.8 km/h) |
| 55 mph (88.51 km/h) | 52.49 mph (84.48 km/h) |
| 60 mph (96.56 km/h) | 57.26 mph (92.16 km/h) |
| 65 mph (104.61 km/h) | 62.03 mph (99.84 km/h) |
| 70 mph (112.65 km/h) | 66.81 mph (107.52 km/h) |
| 75 mph (120.7 km/h) | 71.58 mph (115.19 km/h) |
| 80 mph (128.75 km/h) | 76.35 mph (122.87 km/h) |
| 85 mph (136.79 km/h) | 81.12 mph (130.55 km/h) |
| 90 mph (144.84 km/h) | 85.89 mph (138.23 km/h) |
| 95 mph (152.89 km/h) | 90.67 mph (145.91 km/h) |
| 100 mph (160.93 km/h) | 95.44 mph (153.59 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1911 | 2221 | 2391 | 2497 | 2611 | 2692 | 2782 | 2888 | 3034 | 3180 | 3343 | 3473 | 3709 | 3969 | 4173 | 4303 | 4376 | 4644 | 5019 | 5832 |
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