Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/50-20 | 305/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.43 (773) | 32.01 (813) | 1.57 (40) 5.2% |
| Width inches (mm) | 10.43 (265) | 12.01 (305) | 1.57 (40) 15.1% |
| Circum. inches (mm) | 95.61 (2428.45) | 100.56 (2554.11) | 4.95 (125.66) 5.2% |
| Sidewall Height inches (mm) | 5.22 (132.5) | 6 (152.5) | 0.79 (20) 15.1% |
| Revolutions per mile (km) | 662.7 (411.78) | 630.1 (391.52) | -32.61 (-20.26) -4.9% |
305/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.03 mph (33.85 km/h) |
| 25 mph (40.23 km/h) | 26.29 mph (42.32 km/h) |
| 30 mph (48.28 km/h) | 31.55 mph (50.78 km/h) |
| 35 mph (56.33 km/h) | 36.81 mph (59.24 km/h) |
| 40 mph (64.37 km/h) | 42.07 mph (67.71 km/h) |
| 45 mph (72.42 km/h) | 47.33 mph (76.17 km/h) |
| 50 mph (80.47 km/h) | 52.59 mph (84.63 km/h) |
| 55 mph (88.51 km/h) | 57.85 mph (93.09 km/h) |
| 60 mph (96.56 km/h) | 63.1 mph (101.56 km/h) |
| 65 mph (104.61 km/h) | 68.36 mph (110.02 km/h) |
| 70 mph (112.65 km/h) | 73.62 mph (118.48 km/h) |
| 75 mph (120.7 km/h) | 78.88 mph (126.95 km/h) |
| 80 mph (128.75 km/h) | 84.14 mph (135.41 km/h) |
| 85 mph (136.79 km/h) | 89.4 mph (143.87 km/h) |
| 90 mph (144.84 km/h) | 94.66 mph (152.34 km/h) |
| 95 mph (152.89 km/h) | 99.92 mph (160.8 km/h) |
| 100 mph (160.93 km/h) | 105.17 mph (169.26 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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