Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/40-20 | 245/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (696) | 26.75 (679.5) | -0.65 (-16.5) -2.4% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 86.08 (2186.55) | 84.04 (2134.71) | -2.04 (-51.84) -2.4% |
| Sidewall Height inches (mm) | 3.7 (94) | 3.38 (85.75) | -0.32 (-8.25) -8.8% |
| Revolutions per mile (km) | 736.02 (457.34) | 753.89 (468.45) | 17.87 (11.11) 2.4% |
245/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.53 mph (31.42 km/h) |
| 25 mph (40.23 km/h) | 24.41 mph (39.28 km/h) |
| 30 mph (48.28 km/h) | 29.29 mph (47.14 km/h) |
| 35 mph (56.33 km/h) | 34.17 mph (54.99 km/h) |
| 40 mph (64.37 km/h) | 39.05 mph (62.85 km/h) |
| 45 mph (72.42 km/h) | 43.93 mph (70.7 km/h) |
| 50 mph (80.47 km/h) | 48.81 mph (78.56 km/h) |
| 55 mph (88.51 km/h) | 53.7 mph (86.42 km/h) |
| 60 mph (96.56 km/h) | 58.58 mph (94.27 km/h) |
| 65 mph (104.61 km/h) | 63.46 mph (102.13 km/h) |
| 70 mph (112.65 km/h) | 68.34 mph (109.98 km/h) |
| 75 mph (120.7 km/h) | 73.22 mph (117.84 km/h) |
| 80 mph (128.75 km/h) | 78.1 mph (125.7 km/h) |
| 85 mph (136.79 km/h) | 82.98 mph (133.55 km/h) |
| 90 mph (144.84 km/h) | 87.87 mph (141.41 km/h) |
| 95 mph (152.89 km/h) | 92.75 mph (149.26 km/h) |
| 100 mph (160.93 km/h) | 97.63 mph (157.12 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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
