Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 240/45-18 | 265/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 26.26 (667) | -0.24 (-6.2) -0.9% |
| Width inches (mm) | 9.45 (240) | 10.43 (265) | 0.98 (25) 10.4% |
| Circum. inches (mm) | 83.26 (2114.92) | 82.5 (2095.44) | -0.77 (-19.48) -0.9% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.13 (79.5) | -1.12 (-28.5) -26.4% |
| Revolutions per mile (km) | 760.95 (472.83) | 768.02 (477.23) | 7.07 (4.4) 0.9% |
265/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.82 mph (31.89 km/h) |
| 25 mph (40.23 km/h) | 24.77 mph (39.86 km/h) |
| 30 mph (48.28 km/h) | 29.72 mph (47.84 km/h) |
| 35 mph (56.33 km/h) | 34.68 mph (55.81 km/h) |
| 40 mph (64.37 km/h) | 39.63 mph (63.78 km/h) |
| 45 mph (72.42 km/h) | 44.59 mph (71.75 km/h) |
| 50 mph (80.47 km/h) | 49.54 mph (79.73 km/h) |
| 55 mph (88.51 km/h) | 54.49 mph (87.7 km/h) |
| 60 mph (96.56 km/h) | 59.45 mph (95.67 km/h) |
| 65 mph (104.61 km/h) | 64.4 mph (103.64 km/h) |
| 70 mph (112.65 km/h) | 69.36 mph (111.62 km/h) |
| 75 mph (120.7 km/h) | 74.31 mph (119.59 km/h) |
| 80 mph (128.75 km/h) | 79.26 mph (127.56 km/h) |
| 85 mph (136.79 km/h) | 84.22 mph (135.53 km/h) |
| 90 mph (144.84 km/h) | 89.17 mph (143.51 km/h) |
| 95 mph (152.89 km/h) | 94.13 mph (151.48 km/h) |
| 100 mph (160.93 km/h) | 99.08 mph (159.45 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1954 | 2271 | 2445 | 2553 | 2670 | 2753 | 2844 | 2952 | 3102 | 3252 | 3418 | 3551 | 3792 | 4059 | 4267 | 4400 | 4474 | 4749 | 5132 | 5963 |
Better Fuel Economy Factory Ratios Increased Power
