Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/30-20 | 145/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.26 (667) | 26.85 (682) | 0.59 (15) 2.2% |
| Width inches (mm) | 10.43 (265) | 5.71 (145) | -4.72 (-120) -45.3% |
| Circum. inches (mm) | 82.5 (2095.44) | 84.35 (2142.57) | 1.86 (47.12) 2.2% |
| Sidewall Height inches (mm) | 3.13 (79.5) | 3.43 (87) | 0.3 (7.5) 9.4% |
| Revolutions per mile (km) | 768.02 (477.23) | 751.13 (466.73) | -16.89 (-10.5) -2.2% |
145/60-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.45 mph (32.91 km/h) |
| 25 mph (40.23 km/h) | 25.56 mph (41.14 km/h) |
| 30 mph (48.28 km/h) | 30.67 mph (49.37 km/h) |
| 35 mph (56.33 km/h) | 35.79 mph (57.59 km/h) |
| 40 mph (64.37 km/h) | 40.9 mph (65.82 km/h) |
| 45 mph (72.42 km/h) | 46.01 mph (74.05 km/h) |
| 50 mph (80.47 km/h) | 51.12 mph (82.28 km/h) |
| 55 mph (88.51 km/h) | 56.24 mph (90.5 km/h) |
| 60 mph (96.56 km/h) | 61.35 mph (98.73 km/h) |
| 65 mph (104.61 km/h) | 66.46 mph (106.96 km/h) |
| 70 mph (112.65 km/h) | 71.57 mph (115.19 km/h) |
| 75 mph (120.7 km/h) | 76.69 mph (123.42 km/h) |
| 80 mph (128.75 km/h) | 81.8 mph (131.64 km/h) |
| 85 mph (136.79 km/h) | 86.91 mph (139.87 km/h) |
| 90 mph (144.84 km/h) | 92.02 mph (148.1 km/h) |
| 95 mph (152.89 km/h) | 97.14 mph (156.33 km/h) |
| 100 mph (160.93 km/h) | 102.25 mph (164.55 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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