Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 250/40-18 | 300/35-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.87 (657.2) | 26.27 (667.2) | 0.39 (10) 1.5% |
| Width inches (mm) | 9.84 (250) | 11.81 (300) | 1.97 (50) 20% |
| Circum. inches (mm) | 81.29 (2064.65) | 82.52 (2096.07) | 1.24 (31.42) 1.5% |
| Sidewall Height inches (mm) | 3.94 (100) | 4.13 (105) | 0.2 (5) 5% |
| Revolutions per mile (km) | 779.47 (484.34) | 767.79 (477.08) | -11.68 (-7.26) -1.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.3 mph (32.68 km/h) |
| 25 mph (40.23 km/h) | 25.38 mph (40.85 km/h) |
| 30 mph (48.28 km/h) | 30.46 mph (49.02 km/h) |
| 35 mph (56.33 km/h) | 35.53 mph (57.18 km/h) |
| 40 mph (64.37 km/h) | 40.61 mph (65.35 km/h) |
| 45 mph (72.42 km/h) | 45.68 mph (73.52 km/h) |
| 50 mph (80.47 km/h) | 50.76 mph (81.69 km/h) |
| 55 mph (88.51 km/h) | 55.84 mph (89.86 km/h) |
| 60 mph (96.56 km/h) | 60.91 mph (98.03 km/h) |
| 65 mph (104.61 km/h) | 65.99 mph (106.2 km/h) |
| 70 mph (112.65 km/h) | 71.07 mph (114.37 km/h) |
| 75 mph (120.7 km/h) | 76.14 mph (122.54 km/h) |
| 80 mph (128.75 km/h) | 81.22 mph (130.71 km/h) |
| 85 mph (136.79 km/h) | 86.29 mph (138.88 km/h) |
| 90 mph (144.84 km/h) | 91.37 mph (147.05 km/h) |
| 95 mph (152.89 km/h) | 96.45 mph (155.21 km/h) |
| 100 mph (160.93 km/h) | 101.52 mph (163.38 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 | 2270 | 2444 | 2553 | 2669 | 2752 | 2844 | 2952 | 3101 | 3251 | 3417 | 3550 | 3791 | 4057 | 4265 | 4398 | 4473 | 4748 | 5130 | 5961 |
Better Fuel Economy Factory Ratios Increased Power
