Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/30-18 | 245/45-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.55 (598.2) | 22.68 (576.1) | -0.87 (-22.1) -3.7% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 73.99 (1879.3) | 71.25 (1809.87) | -2.73 (-69.43) -3.7% |
| Sidewall Height inches (mm) | 2.78 (70.5) | 4.34 (110.25) | 1.56 (39.75) 56.4% |
| Revolutions per mile (km) | 856.35 (532.11) | 889.2 (552.52) | 32.85 (20.41) 3.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.26 mph (31 km/h) |
| 25 mph (40.23 km/h) | 24.08 mph (38.75 km/h) |
| 30 mph (48.28 km/h) | 28.89 mph (46.5 km/h) |
| 35 mph (56.33 km/h) | 33.71 mph (54.25 km/h) |
| 40 mph (64.37 km/h) | 38.52 mph (62 km/h) |
| 45 mph (72.42 km/h) | 43.34 mph (69.75 km/h) |
| 50 mph (80.47 km/h) | 48.15 mph (77.49 km/h) |
| 55 mph (88.51 km/h) | 52.97 mph (85.24 km/h) |
| 60 mph (96.56 km/h) | 57.78 mph (92.99 km/h) |
| 65 mph (104.61 km/h) | 62.6 mph (100.74 km/h) |
| 70 mph (112.65 km/h) | 67.41 mph (108.49 km/h) |
| 75 mph (120.7 km/h) | 72.23 mph (116.24 km/h) |
| 80 mph (128.75 km/h) | 77.04 mph (123.99 km/h) |
| 85 mph (136.79 km/h) | 81.86 mph (131.74 km/h) |
| 90 mph (144.84 km/h) | 86.68 mph (139.49 km/h) |
| 95 mph (152.89 km/h) | 91.49 mph (147.24 km/h) |
| 100 mph (160.93 km/h) | 96.31 mph (154.99 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2263 | 2629 | 2831 | 2956 | 3091 | 3187 | 3293 | 3418 | 3592 | 3765 | 3958 | 4112 | 4391 | 4699 | 4940 | 5094 | 5180 | 5498 | 5941 | 6904 |
Better Fuel Economy Factory Ratios Increased Power
