Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/40-21 | 305/35-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.29 (769.4) | 29.41 (746.9) | -0.89 (-22.5) -2.9% |
| Width inches (mm) | 11.61 (295) | 12.01 (305) | 0.39 (10) 3.4% |
| Circum. inches (mm) | 95.16 (2417.14) | 92.38 (2346.46) | -2.78 (-70.69) -2.9% |
| Sidewall Height inches (mm) | 4.65 (118) | 4.2 (106.75) | -0.44 (-11.25) -9.5% |
| Revolutions per mile (km) | 665.8 (413.71) | 685.86 (426.17) | 20.06 (12.46) 3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.42 mph (31.25 km/h) |
| 25 mph (40.23 km/h) | 24.27 mph (39.06 km/h) |
| 30 mph (48.28 km/h) | 29.12 mph (46.87 km/h) |
| 35 mph (56.33 km/h) | 33.98 mph (54.68 km/h) |
| 40 mph (64.37 km/h) | 38.83 mph (62.49 km/h) |
| 45 mph (72.42 km/h) | 43.68 mph (70.3 km/h) |
| 50 mph (80.47 km/h) | 48.54 mph (78.11 km/h) |
| 55 mph (88.51 km/h) | 53.39 mph (85.93 km/h) |
| 60 mph (96.56 km/h) | 58.25 mph (93.74 km/h) |
| 65 mph (104.61 km/h) | 63.1 mph (101.55 km/h) |
| 70 mph (112.65 km/h) | 67.95 mph (109.36 km/h) |
| 75 mph (120.7 km/h) | 72.81 mph (117.17 km/h) |
| 80 mph (128.75 km/h) | 77.66 mph (124.98 km/h) |
| 85 mph (136.79 km/h) | 82.51 mph (132.79 km/h) |
| 90 mph (144.84 km/h) | 87.37 mph (140.61 km/h) |
| 95 mph (152.89 km/h) | 92.22 mph (148.42 km/h) |
| 100 mph (160.93 km/h) | 97.08 mph (156.23 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1745 | 2028 | 2184 | 2280 | 2384 | 2458 | 2540 | 2637 | 2770 | 2904 | 3053 | 3171 | 3387 | 3624 | 3810 | 3929 | 3996 | 4241 | 4583 | 5325 |
Better Fuel Economy Factory Ratios Increased Power
