Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/30-20 | 235/45-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.55 (649) | 27.33 (694.1) | 1.78 (45.1) 6.9% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 80.27 (2038.89) | 85.85 (2180.58) | 5.58 (141.69) 6.9% |
| Sidewall Height inches (mm) | 2.78 (70.5) | 4.16 (105.75) | 1.39 (35.25) 50% |
| Revolutions per mile (km) | 789.32 (490.46) | 738.04 (458.59) | -51.29 (-31.87) -6.5% |
235/45-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.39 mph (34.42 km/h) |
| 25 mph (40.23 km/h) | 26.74 mph (43.03 km/h) |
| 30 mph (48.28 km/h) | 32.08 mph (51.64 km/h) |
| 35 mph (56.33 km/h) | 37.43 mph (60.24 km/h) |
| 40 mph (64.37 km/h) | 42.78 mph (68.85 km/h) |
| 45 mph (72.42 km/h) | 48.13 mph (77.45 km/h) |
| 50 mph (80.47 km/h) | 53.47 mph (86.06 km/h) |
| 55 mph (88.51 km/h) | 58.82 mph (94.67 km/h) |
| 60 mph (96.56 km/h) | 64.17 mph (103.27 km/h) |
| 65 mph (104.61 km/h) | 69.52 mph (111.88 km/h) |
| 70 mph (112.65 km/h) | 74.86 mph (120.48 km/h) |
| 75 mph (120.7 km/h) | 80.21 mph (129.09 km/h) |
| 80 mph (128.75 km/h) | 85.56 mph (137.69 km/h) |
| 85 mph (136.79 km/h) | 90.91 mph (146.3 km/h) |
| 90 mph (144.84 km/h) | 96.25 mph (154.91 km/h) |
| 95 mph (152.89 km/h) | 101.6 mph (163.51 km/h) |
| 100 mph (160.93 km/h) | 106.95 mph (172.12 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1878 | 2182 | 2350 | 2454 | 2565 | 2645 | 2733 | 2837 | 2981 | 3125 | 3285 | 3413 | 3644 | 3900 | 4100 | 4228 | 4300 | 4564 | 4931 | 5730 |
Better Fuel Economy Factory Ratios Increased Power
