Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/55-20 | 235/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.04 (788.5) | 30.18 (766.5) | -0.87 (-22) -2.8% |
| Width inches (mm) | 10.04 (255) | 9.25 (235) | -0.79 (-20) -7.8% |
| Circum. inches (mm) | 97.53 (2477.15) | 94.8 (2408.03) | -2.72 (-69.12) -2.8% |
| Sidewall Height inches (mm) | 5.52 (140.25) | 5.09 (129.25) | -0.43 (-11) -7.8% |
| Revolutions per mile (km) | 649.68 (403.69) | 668.32 (415.28) | 18.65 (11.59) 2.9% |
235/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.44 mph (31.29 km/h) |
| 25 mph (40.23 km/h) | 24.3 mph (39.11 km/h) |
| 30 mph (48.28 km/h) | 29.16 mph (46.93 km/h) |
| 35 mph (56.33 km/h) | 34.02 mph (54.76 km/h) |
| 40 mph (64.37 km/h) | 38.88 mph (62.58 km/h) |
| 45 mph (72.42 km/h) | 43.74 mph (70.4 km/h) |
| 50 mph (80.47 km/h) | 48.6 mph (78.22 km/h) |
| 55 mph (88.51 km/h) | 53.47 mph (86.04 km/h) |
| 60 mph (96.56 km/h) | 58.33 mph (93.87 km/h) |
| 65 mph (104.61 km/h) | 63.19 mph (101.69 km/h) |
| 70 mph (112.65 km/h) | 68.05 mph (109.51 km/h) |
| 75 mph (120.7 km/h) | 72.91 mph (117.33 km/h) |
| 80 mph (128.75 km/h) | 77.77 mph (125.16 km/h) |
| 85 mph (136.79 km/h) | 82.63 mph (132.98 km/h) |
| 90 mph (144.84 km/h) | 87.49 mph (140.8 km/h) |
| 95 mph (152.89 km/h) | 92.35 mph (148.62 km/h) |
| 100 mph (160.93 km/h) | 97.21 mph (156.44 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1701 | 1976 | 2128 | 2222 | 2323 | 2396 | 2475 | 2569 | 2699 | 2830 | 2975 | 3090 | 3300 | 3532 | 3713 | 3829 | 3894 | 4132 | 4465 | 5189 |
Better Fuel Economy Factory Ratios Increased Power
