Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-21 | 245/35-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.97 (735.9) | 27.75 (704.9) | -1.22 (-31) -4.2% |
| Width inches (mm) | 8.86 (225) | 9.65 (245) | 0.79 (20) 8.9% |
| Circum. inches (mm) | 91.02 (2311.9) | 87.19 (2214.51) | -3.83 (-97.39) -4.2% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 3.38 (85.75) | -0.61 (-15.5) -15.3% |
| Revolutions per mile (km) | 696.11 (432.54) | 726.73 (451.57) | 30.61 (19.02) 4.4% |
245/35-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.16 mph (30.83 km/h) |
| 25 mph (40.23 km/h) | 23.95 mph (38.54 km/h) |
| 30 mph (48.28 km/h) | 28.74 mph (46.25 km/h) |
| 35 mph (56.33 km/h) | 33.53 mph (53.95 km/h) |
| 40 mph (64.37 km/h) | 38.31 mph (61.66 km/h) |
| 45 mph (72.42 km/h) | 43.1 mph (69.37 km/h) |
| 50 mph (80.47 km/h) | 47.89 mph (77.08 km/h) |
| 55 mph (88.51 km/h) | 52.68 mph (84.79 km/h) |
| 60 mph (96.56 km/h) | 57.47 mph (92.49 km/h) |
| 65 mph (104.61 km/h) | 62.26 mph (100.2 km/h) |
| 70 mph (112.65 km/h) | 67.05 mph (107.91 km/h) |
| 75 mph (120.7 km/h) | 71.84 mph (115.62 km/h) |
| 80 mph (128.75 km/h) | 76.63 mph (123.32 km/h) |
| 85 mph (136.79 km/h) | 81.42 mph (131.03 km/h) |
| 90 mph (144.84 km/h) | 86.21 mph (138.74 km/h) |
| 95 mph (152.89 km/h) | 91 mph (146.45 km/h) |
| 100 mph (160.93 km/h) | 95.79 mph (154.16 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1849 | 2148 | 2314 | 2416 | 2526 | 2605 | 2691 | 2794 | 2935 | 3077 | 3234 | 3360 | 3589 | 3840 | 4037 | 4163 | 4234 | 4494 | 4856 | 5643 |
Better Fuel Economy Factory Ratios Increased Power
