Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/30-21 | 315/30-22 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.97 (710.4) | 29.44 (747.8) | 1.47 (37.4) 5.3% |
| Width inches (mm) | 11.61 (295) | 12.4 (315) | 0.79 (20) 6.8% |
| Circum. inches (mm) | 87.87 (2231.79) | 92.49 (2349.28) | 4.63 (117.5) 5.3% |
| Sidewall Height inches (mm) | 3.48 (88.5) | 3.72 (94.5) | 0.24 (6) 6.8% |
| Revolutions per mile (km) | 721.1 (448.07) | 685.04 (425.66) | -36.06 (-22.41) -5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.05 mph (33.88 km/h) |
| 25 mph (40.23 km/h) | 26.32 mph (42.35 km/h) |
| 30 mph (48.28 km/h) | 31.58 mph (50.82 km/h) |
| 35 mph (56.33 km/h) | 36.84 mph (59.29 km/h) |
| 40 mph (64.37 km/h) | 42.11 mph (67.76 km/h) |
| 45 mph (72.42 km/h) | 47.37 mph (76.23 km/h) |
| 50 mph (80.47 km/h) | 52.63 mph (84.7 km/h) |
| 55 mph (88.51 km/h) | 57.9 mph (93.17 km/h) |
| 60 mph (96.56 km/h) | 63.16 mph (101.64 km/h) |
| 65 mph (104.61 km/h) | 68.42 mph (110.11 km/h) |
| 70 mph (112.65 km/h) | 73.69 mph (118.59 km/h) |
| 75 mph (120.7 km/h) | 78.95 mph (127.06 km/h) |
| 80 mph (128.75 km/h) | 84.21 mph (135.53 km/h) |
| 85 mph (136.79 km/h) | 89.47 mph (144 km/h) |
| 90 mph (144.84 km/h) | 94.74 mph (152.47 km/h) |
| 95 mph (152.89 km/h) | 100 mph (160.94 km/h) |
| 100 mph (160.93 km/h) | 105.26 mph (169.41 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1743 | 2025 | 2181 | 2277 | 2381 | 2455 | 2537 | 2633 | 2767 | 2901 | 3049 | 3168 | 3383 | 3620 | 3806 | 3924 | 3991 | 4236 | 4577 | 5319 |
Better Fuel Economy Factory Ratios Increased Power
