Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/30-18 | 245/25-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.55 (598.2) | 24.82 (630.5) | 1.27 (32.3) 5.4% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 73.99 (1879.3) | 77.98 (1980.77) | 4 (101.47) 5.4% |
| 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) | 812.48 (504.85) | -43.87 (-27.26) -5.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.08 mph (33.92 km/h) |
| 25 mph (40.23 km/h) | 26.35 mph (42.41 km/h) |
| 30 mph (48.28 km/h) | 31.62 mph (50.89 km/h) |
| 35 mph (56.33 km/h) | 36.89 mph (59.37 km/h) |
| 40 mph (64.37 km/h) | 42.16 mph (67.85 km/h) |
| 45 mph (72.42 km/h) | 47.43 mph (76.33 km/h) |
| 50 mph (80.47 km/h) | 52.7 mph (84.81 km/h) |
| 55 mph (88.51 km/h) | 57.97 mph (93.29 km/h) |
| 60 mph (96.56 km/h) | 63.24 mph (101.77 km/h) |
| 65 mph (104.61 km/h) | 68.51 mph (110.26 km/h) |
| 70 mph (112.65 km/h) | 73.78 mph (118.74 km/h) |
| 75 mph (120.7 km/h) | 79.05 mph (127.22 km/h) |
| 80 mph (128.75 km/h) | 84.32 mph (135.7 km/h) |
| 85 mph (136.79 km/h) | 89.59 mph (144.18 km/h) |
| 90 mph (144.84 km/h) | 94.86 mph (152.66 km/h) |
| 95 mph (152.89 km/h) | 100.13 mph (161.14 km/h) |
| 100 mph (160.93 km/h) | 105.4 mph (169.62 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2068 | 2402 | 2587 | 2701 | 2824 | 2912 | 3009 | 3123 | 3282 | 3440 | 3616 | 3757 | 4012 | 4294 | 4514 | 4654 | 4734 | 5024 | 5429 | 6308 |
Better Fuel Economy Factory Ratios Increased Power
