Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/30-18 | 245/25-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.55 (598.2) | 22.82 (579.7) | -0.73 (-18.5) -3.1% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 73.99 (1879.3) | 71.7 (1821.18) | -2.29 (-58.12) -3.1% |
| Sidewall Height inches (mm) | 2.78 (70.5) | 2.41 (61.25) | -0.36 (-9.25) -13.1% |
| Revolutions per mile (km) | 856.35 (532.11) | 883.68 (549.09) | 27.33 (16.98) 3.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.38 mph (31.19 km/h) |
| 25 mph (40.23 km/h) | 24.23 mph (38.99 km/h) |
| 30 mph (48.28 km/h) | 29.07 mph (46.79 km/h) |
| 35 mph (56.33 km/h) | 33.92 mph (54.59 km/h) |
| 40 mph (64.37 km/h) | 38.76 mph (62.38 km/h) |
| 45 mph (72.42 km/h) | 43.61 mph (70.18 km/h) |
| 50 mph (80.47 km/h) | 48.45 mph (77.98 km/h) |
| 55 mph (88.51 km/h) | 53.3 mph (85.78 km/h) |
| 60 mph (96.56 km/h) | 58.14 mph (93.57 km/h) |
| 65 mph (104.61 km/h) | 62.99 mph (101.37 km/h) |
| 70 mph (112.65 km/h) | 67.84 mph (109.17 km/h) |
| 75 mph (120.7 km/h) | 72.68 mph (116.97 km/h) |
| 80 mph (128.75 km/h) | 77.53 mph (124.77 km/h) |
| 85 mph (136.79 km/h) | 82.37 mph (132.56 km/h) |
| 90 mph (144.84 km/h) | 87.22 mph (140.36 km/h) |
| 95 mph (152.89 km/h) | 92.06 mph (148.16 km/h) |
| 100 mph (160.93 km/h) | 96.91 mph (155.96 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2249 | 2612 | 2813 | 2938 | 3072 | 3167 | 3273 | 3397 | 3569 | 3742 | 3933 | 4086 | 4364 | 4670 | 4909 | 5062 | 5148 | 5464 | 5904 | 6861 |
Better Fuel Economy Factory Ratios Increased Power
