Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/45-20 | 265/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.68 (728.5) | 26.26 (667) | -2.42 (-61.5) -8.4% |
| Width inches (mm) | 9.65 (245) | 10.43 (265) | 0.79 (20) 8.2% |
| Circum. inches (mm) | 90.1 (2288.65) | 82.5 (2095.44) | -7.61 (-193.21) -8.4% |
| Sidewall Height inches (mm) | 4.34 (110.25) | 3.13 (79.5) | -1.21 (-30.75) -27.9% |
| Revolutions per mile (km) | 703.18 (436.94) | 768.02 (477.23) | 64.84 (40.29) 9.2% |
265/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.31 mph (29.47 km/h) |
| 25 mph (40.23 km/h) | 22.89 mph (36.84 km/h) |
| 30 mph (48.28 km/h) | 27.47 mph (44.2 km/h) |
| 35 mph (56.33 km/h) | 32.05 mph (51.57 km/h) |
| 40 mph (64.37 km/h) | 36.62 mph (58.94 km/h) |
| 45 mph (72.42 km/h) | 41.2 mph (66.31 km/h) |
| 50 mph (80.47 km/h) | 45.78 mph (73.67 km/h) |
| 55 mph (88.51 km/h) | 50.36 mph (81.04 km/h) |
| 60 mph (96.56 km/h) | 54.93 mph (88.41 km/h) |
| 65 mph (104.61 km/h) | 59.51 mph (95.78 km/h) |
| 70 mph (112.65 km/h) | 64.09 mph (103.14 km/h) |
| 75 mph (120.7 km/h) | 68.67 mph (110.51 km/h) |
| 80 mph (128.75 km/h) | 73.25 mph (117.88 km/h) |
| 85 mph (136.79 km/h) | 77.82 mph (125.25 km/h) |
| 90 mph (144.84 km/h) | 82.4 mph (132.61 km/h) |
| 95 mph (152.89 km/h) | 86.98 mph (139.98 km/h) |
| 100 mph (160.93 km/h) | 91.56 mph (147.35 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
