Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/30-20 | 245/25-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.55 (649) | 24.82 (630.5) | -0.73 (-18.5) -2.9% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 80.27 (2038.89) | 77.98 (1980.77) | -2.29 (-58.12) -2.9% |
| Sidewall Height inches (mm) | 2.78 (70.5) | 2.41 (61.25) | -0.36 (-9.25) -13.1% |
| Revolutions per mile (km) | 789.32 (490.46) | 812.48 (504.85) | 23.16 (14.39) 2.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.43 mph (31.27 km/h) |
| 25 mph (40.23 km/h) | 24.29 mph (39.09 km/h) |
| 30 mph (48.28 km/h) | 29.14 mph (46.9 km/h) |
| 35 mph (56.33 km/h) | 34 mph (54.72 km/h) |
| 40 mph (64.37 km/h) | 38.86 mph (62.54 km/h) |
| 45 mph (72.42 km/h) | 43.72 mph (70.36 km/h) |
| 50 mph (80.47 km/h) | 48.57 mph (78.17 km/h) |
| 55 mph (88.51 km/h) | 53.43 mph (85.99 km/h) |
| 60 mph (96.56 km/h) | 58.29 mph (93.81 km/h) |
| 65 mph (104.61 km/h) | 63.15 mph (101.63 km/h) |
| 70 mph (112.65 km/h) | 68 mph (109.44 km/h) |
| 75 mph (120.7 km/h) | 72.86 mph (117.26 km/h) |
| 80 mph (128.75 km/h) | 77.72 mph (125.08 km/h) |
| 85 mph (136.79 km/h) | 82.58 mph (132.9 km/h) |
| 90 mph (144.84 km/h) | 87.43 mph (140.71 km/h) |
| 95 mph (152.89 km/h) | 92.29 mph (148.53 km/h) |
| 100 mph (160.93 km/h) | 97.15 mph (156.35 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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
