Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 245/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 26.75 (679.5) | -3.65 (-92.7) -12% |
| Width inches (mm) | 6.89 (175) | 9.65 (245) | 2.76 (70) 40% |
| Circum. inches (mm) | 95.51 (2425.94) | 84.04 (2134.71) | -11.47 (-291.23) -12% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 3.38 (85.75) | -2.82 (-71.75) -45.6% |
| Revolutions per mile (km) | 663.39 (412.21) | 753.89 (468.45) | 90.5 (56.24) 13.6% |
245/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.6 mph (28.32 km/h) |
| 25 mph (40.23 km/h) | 22 mph (35.4 km/h) |
| 30 mph (48.28 km/h) | 26.4 mph (42.48 km/h) |
| 35 mph (56.33 km/h) | 30.8 mph (49.57 km/h) |
| 40 mph (64.37 km/h) | 35.2 mph (56.65 km/h) |
| 45 mph (72.42 km/h) | 39.6 mph (63.73 km/h) |
| 50 mph (80.47 km/h) | 44 mph (70.81 km/h) |
| 55 mph (88.51 km/h) | 48.4 mph (77.89 km/h) |
| 60 mph (96.56 km/h) | 52.8 mph (84.97 km/h) |
| 65 mph (104.61 km/h) | 57.2 mph (92.05 km/h) |
| 70 mph (112.65 km/h) | 61.6 mph (99.13 km/h) |
| 75 mph (120.7 km/h) | 66 mph (106.21 km/h) |
| 80 mph (128.75 km/h) | 70.4 mph (113.29 km/h) |
| 85 mph (136.79 km/h) | 74.8 mph (120.37 km/h) |
| 90 mph (144.84 km/h) | 79.2 mph (127.45 km/h) |
| 95 mph (152.89 km/h) | 83.6 mph (134.53 km/h) |
| 100 mph (160.93 km/h) | 88 mph (141.62 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1919 | 2229 | 2400 | 2506 | 2621 | 2702 | 2792 | 2898 | 3045 | 3192 | 3355 | 3486 | 3723 | 3984 | 4188 | 4319 | 4392 | 4662 | 5037 | 5854 |
Better Fuel Economy Factory Ratios Increased Power
