Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/30-21 | 225/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.79 (680.4) | 26.2 (665.5) | -0.59 (-14.9) -2.2% |
| Width inches (mm) | 9.65 (245) | 8.86 (225) | -0.79 (-20) -8.2% |
| Circum. inches (mm) | 84.16 (2137.54) | 82.31 (2090.73) | -1.84 (-46.81) -2.2% |
| Sidewall Height inches (mm) | 2.89 (73.5) | 3.1 (78.75) | 0.21 (5.25) 7.1% |
| Revolutions per mile (km) | 752.9 (467.83) | 769.75 (478.3) | 16.86 (10.47) 2.2% |
225/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.56 mph (31.48 km/h) |
| 25 mph (40.23 km/h) | 24.45 mph (39.35 km/h) |
| 30 mph (48.28 km/h) | 29.34 mph (47.22 km/h) |
| 35 mph (56.33 km/h) | 34.23 mph (55.09 km/h) |
| 40 mph (64.37 km/h) | 39.12 mph (62.96 km/h) |
| 45 mph (72.42 km/h) | 44.01 mph (70.83 km/h) |
| 50 mph (80.47 km/h) | 48.91 mph (78.71 km/h) |
| 55 mph (88.51 km/h) | 53.8 mph (86.58 km/h) |
| 60 mph (96.56 km/h) | 58.69 mph (94.45 km/h) |
| 65 mph (104.61 km/h) | 63.58 mph (102.32 km/h) |
| 70 mph (112.65 km/h) | 68.47 mph (110.19 km/h) |
| 75 mph (120.7 km/h) | 73.36 mph (118.06 km/h) |
| 80 mph (128.75 km/h) | 78.25 mph (125.93 km/h) |
| 85 mph (136.79 km/h) | 83.14 mph (133.8 km/h) |
| 90 mph (144.84 km/h) | 88.03 mph (141.67 km/h) |
| 95 mph (152.89 km/h) | 92.92 mph (149.54 km/h) |
| 100 mph (160.93 km/h) | 97.81 mph (157.41 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1959 | 2276 | 2451 | 2559 | 2676 | 2759 | 2851 | 2959 | 3109 | 3259 | 3426 | 3559 | 3801 | 4068 | 4276 | 4410 | 4485 | 4760 | 5143 | 5977 |
Better Fuel Economy Factory Ratios Increased Power
