Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/60-18 | 305/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.94 (811.2) | 33.21 (843.5) | 1.27 (32.3) 4% |
| Width inches (mm) | 11.61 (295) | 12.01 (305) | 0.39 (10) 3.4% |
| Circum. inches (mm) | 100.33 (2548.46) | 104.33 (2649.93) | 4 (101.47) 4% |
| Sidewall Height inches (mm) | 6.97 (177) | 6.6 (167.75) | -0.36 (-9.25) -5.2% |
| Revolutions per mile (km) | 631.5 (392.39) | 607.31 (377.37) | -24.18 (-15.03) -3.8% |
305/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.8 mph (33.47 km/h) |
| 25 mph (40.23 km/h) | 26 mph (41.84 km/h) |
| 30 mph (48.28 km/h) | 31.19 mph (50.2 km/h) |
| 35 mph (56.33 km/h) | 36.39 mph (58.57 km/h) |
| 40 mph (64.37 km/h) | 41.59 mph (66.94 km/h) |
| 45 mph (72.42 km/h) | 46.79 mph (75.3 km/h) |
| 50 mph (80.47 km/h) | 51.99 mph (83.67 km/h) |
| 55 mph (88.51 km/h) | 57.19 mph (92.04 km/h) |
| 60 mph (96.56 km/h) | 62.39 mph (100.41 km/h) |
| 65 mph (104.61 km/h) | 67.59 mph (108.77 km/h) |
| 70 mph (112.65 km/h) | 72.79 mph (117.14 km/h) |
| 75 mph (120.7 km/h) | 77.99 mph (125.51 km/h) |
| 80 mph (128.75 km/h) | 83.19 mph (133.87 km/h) |
| 85 mph (136.79 km/h) | 88.38 mph (142.24 km/h) |
| 90 mph (144.84 km/h) | 93.58 mph (150.61 km/h) |
| 95 mph (152.89 km/h) | 98.78 mph (158.98 km/h) |
| 100 mph (160.93 km/h) | 103.98 mph (167.34 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1546 | 1795 | 1934 | 2019 | 2111 | 2177 | 2249 | 2335 | 2453 | 2571 | 2703 | 2808 | 2999 | 3209 | 3374 | 3479 | 3538 | 3755 | 4058 | 4715 |
Better Fuel Economy Factory Ratios Increased Power
