Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/75-16.5 | 305/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.97 (786.6) | 32.01 (813) | 1.04 (26.4) 3.4% |
| Width inches (mm) | 9.65 (245) | 12.01 (305) | 2.36 (60) 24.5% |
| Circum. inches (mm) | 97.29 (2471.18) | 100.56 (2554.11) | 3.27 (82.94) 3.4% |
| Sidewall Height inches (mm) | 7.23 (183.75) | 6 (152.5) | -1.23 (-31.25) -17% |
| Revolutions per mile (km) | 651.25 (404.66) | 630.1 (391.52) | -21.15 (-13.14) -3.2% |
305/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.67 mph (33.27 km/h) |
| 25 mph (40.23 km/h) | 25.84 mph (41.58 km/h) |
| 30 mph (48.28 km/h) | 31.01 mph (49.9 km/h) |
| 35 mph (56.33 km/h) | 36.17 mph (58.22 km/h) |
| 40 mph (64.37 km/h) | 41.34 mph (66.53 km/h) |
| 45 mph (72.42 km/h) | 46.51 mph (74.85 km/h) |
| 50 mph (80.47 km/h) | 51.68 mph (83.17 km/h) |
| 55 mph (88.51 km/h) | 56.85 mph (91.48 km/h) |
| 60 mph (96.56 km/h) | 62.01 mph (99.8 km/h) |
| 65 mph (104.61 km/h) | 67.18 mph (108.12 km/h) |
| 70 mph (112.65 km/h) | 72.35 mph (116.44 km/h) |
| 75 mph (120.7 km/h) | 77.52 mph (124.75 km/h) |
| 80 mph (128.75 km/h) | 82.68 mph (133.07 km/h) |
| 85 mph (136.79 km/h) | 87.85 mph (141.39 km/h) |
| 90 mph (144.84 km/h) | 93.02 mph (149.7 km/h) |
| 95 mph (152.89 km/h) | 98.19 mph (158.02 km/h) |
| 100 mph (160.93 km/h) | 103.36 mph (166.34 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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