Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/30-20 | 235/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.31 (643) | 28.33 (719.5) | 3.01 (76.5) 11.9% |
| Width inches (mm) | 8.86 (225) | 9.25 (235) | 0.39 (10) 4.4% |
| Circum. inches (mm) | 79.53 (2020.04) | 88.99 (2260.38) | 9.46 (240.33) 11.9% |
| Sidewall Height inches (mm) | 2.66 (67.5) | 4.16 (105.75) | 1.51 (38.25) 56.7% |
| Revolutions per mile (km) | 796.69 (495.04) | 711.98 (442.4) | -84.71 (-52.63) -10.6% |
235/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.38 mph (36.02 km/h) |
| 25 mph (40.23 km/h) | 27.97 mph (45.02 km/h) |
| 30 mph (48.28 km/h) | 33.57 mph (54.02 km/h) |
| 35 mph (56.33 km/h) | 39.16 mph (63.03 km/h) |
| 40 mph (64.37 km/h) | 44.76 mph (72.03 km/h) |
| 45 mph (72.42 km/h) | 50.35 mph (81.04 km/h) |
| 50 mph (80.47 km/h) | 55.95 mph (90.04 km/h) |
| 55 mph (88.51 km/h) | 61.54 mph (99.04 km/h) |
| 60 mph (96.56 km/h) | 67.14 mph (108.05 km/h) |
| 65 mph (104.61 km/h) | 72.73 mph (117.05 km/h) |
| 70 mph (112.65 km/h) | 78.33 mph (126.06 km/h) |
| 75 mph (120.7 km/h) | 83.92 mph (135.06 km/h) |
| 80 mph (128.75 km/h) | 89.52 mph (144.07 km/h) |
| 85 mph (136.79 km/h) | 95.11 mph (153.07 km/h) |
| 90 mph (144.84 km/h) | 100.71 mph (162.07 km/h) |
| 95 mph (152.89 km/h) | 106.3 mph (171.08 km/h) |
| 100 mph (160.93 km/h) | 111.9 mph (180.08 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1812 | 2105 | 2267 | 2367 | 2475 | 2552 | 2637 | 2737 | 2876 | 3015 | 3169 | 3292 | 3516 | 3762 | 3955 | 4079 | 4148 | 4402 | 4757 | 5528 |
Better Fuel Economy Factory Ratios Increased Power
