Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/60-20 | 305/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.8 (706) | 32.01 (813) | 4.21 (107) 15.2% |
| Width inches (mm) | 6.5 (165) | 12.01 (305) | 5.51 (140) 84.8% |
| Circum. inches (mm) | 87.32 (2217.96) | 100.56 (2554.11) | 13.23 (336.15) 15.2% |
| Sidewall Height inches (mm) | 3.9 (99) | 6 (152.5) | 2.11 (53.5) 54% |
| Revolutions per mile (km) | 725.6 (450.86) | 630.1 (391.52) | -95.5 (-59.34) -13.2% |
305/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.03 mph (37.07 km/h) |
| 25 mph (40.23 km/h) | 28.79 mph (46.33 km/h) |
| 30 mph (48.28 km/h) | 34.55 mph (55.6 km/h) |
| 35 mph (56.33 km/h) | 40.3 mph (64.86 km/h) |
| 40 mph (64.37 km/h) | 46.06 mph (74.13 km/h) |
| 45 mph (72.42 km/h) | 51.82 mph (83.4 km/h) |
| 50 mph (80.47 km/h) | 57.58 mph (92.66 km/h) |
| 55 mph (88.51 km/h) | 63.34 mph (101.93 km/h) |
| 60 mph (96.56 km/h) | 69.09 mph (111.2 km/h) |
| 65 mph (104.61 km/h) | 74.85 mph (120.46 km/h) |
| 70 mph (112.65 km/h) | 80.61 mph (129.73 km/h) |
| 75 mph (120.7 km/h) | 86.37 mph (138.99 km/h) |
| 80 mph (128.75 km/h) | 92.12 mph (148.26 km/h) |
| 85 mph (136.79 km/h) | 97.88 mph (157.53 km/h) |
| 90 mph (144.84 km/h) | 103.64 mph (166.79 km/h) |
| 95 mph (152.89 km/h) | 109.4 mph (176.06 km/h) |
| 100 mph (160.93 km/h) | 115.16 mph (185.33 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1603 | 1863 | 2006 | 2095 | 2190 | 2259 | 2334 | 2422 | 2545 | 2668 | 2804 | 2914 | 3111 | 3330 | 3500 | 3610 | 3671 | 3896 | 4210 | 4892 |
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