Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 205/50-15 | 305/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.07 (586) | 32.01 (813) | 8.94 (227) 38.7% |
| Width inches (mm) | 8.07 (205) | 12.01 (305) | 3.94 (100) 48.8% |
| Circum. inches (mm) | 72.48 (1840.97) | 100.56 (2554.11) | 28.08 (713.14) 38.7% |
| Sidewall Height inches (mm) | 4.04 (102.5) | 6 (152.5) | 1.97 (50) 48.8% |
| Revolutions per mile (km) | 874.18 (543.19) | 630.1 (391.52) | -244.08 (-151.67) -27.9% |
305/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.75 mph (44.66 km/h) |
| 25 mph (40.23 km/h) | 34.68 mph (55.82 km/h) |
| 30 mph (48.28 km/h) | 41.62 mph (66.98 km/h) |
| 35 mph (56.33 km/h) | 48.56 mph (78.15 km/h) |
| 40 mph (64.37 km/h) | 55.49 mph (89.31 km/h) |
| 45 mph (72.42 km/h) | 62.43 mph (100.47 km/h) |
| 50 mph (80.47 km/h) | 69.37 mph (111.64 km/h) |
| 55 mph (88.51 km/h) | 76.31 mph (122.8 km/h) |
| 60 mph (96.56 km/h) | 83.24 mph (133.97 km/h) |
| 65 mph (104.61 km/h) | 90.18 mph (145.13 km/h) |
| 70 mph (112.65 km/h) | 97.12 mph (156.29 km/h) |
| 75 mph (120.7 km/h) | 104.05 mph (167.46 km/h) |
| 80 mph (128.75 km/h) | 110.99 mph (178.62 km/h) |
| 85 mph (136.79 km/h) | 117.93 mph (189.78 km/h) |
| 90 mph (144.84 km/h) | 124.86 mph (200.95 km/h) |
| 95 mph (152.89 km/h) | 131.8 mph (212.11 km/h) |
| 100 mph (160.93 km/h) | 138.74 mph (223.28 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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