Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/35-21 | 315/30-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.3 (718.9) | 28.44 (722.4) | 0.14 (3.5) 0.5% |
| Width inches (mm) | 10.43 (265) | 12.4 (315) | 1.97 (50) 18.9% |
| Circum. inches (mm) | 88.92 (2258.49) | 89.35 (2269.49) | 0.43 (11) 0.5% |
| Sidewall Height inches (mm) | 3.65 (92.75) | 3.72 (94.5) | 0.07 (1.75) 1.9% |
| Revolutions per mile (km) | 712.57 (442.77) | 709.12 (440.63) | -3.45 (-2.15) -0.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.1 mph (32.34 km/h) |
| 25 mph (40.23 km/h) | 25.12 mph (40.43 km/h) |
| 30 mph (48.28 km/h) | 30.15 mph (48.52 km/h) |
| 35 mph (56.33 km/h) | 35.17 mph (56.6 km/h) |
| 40 mph (64.37 km/h) | 40.19 mph (64.69 km/h) |
| 45 mph (72.42 km/h) | 45.22 mph (72.77 km/h) |
| 50 mph (80.47 km/h) | 50.24 mph (80.86 km/h) |
| 55 mph (88.51 km/h) | 55.27 mph (88.95 km/h) |
| 60 mph (96.56 km/h) | 60.29 mph (97.03 km/h) |
| 65 mph (104.61 km/h) | 65.32 mph (105.12 km/h) |
| 70 mph (112.65 km/h) | 70.34 mph (113.2 km/h) |
| 75 mph (120.7 km/h) | 75.37 mph (121.29 km/h) |
| 80 mph (128.75 km/h) | 80.39 mph (129.37 km/h) |
| 85 mph (136.79 km/h) | 85.41 mph (137.46 km/h) |
| 90 mph (144.84 km/h) | 90.44 mph (145.55 km/h) |
| 95 mph (152.89 km/h) | 95.46 mph (153.63 km/h) |
| 100 mph (160.93 km/h) | 100.49 mph (161.72 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1805 | 2096 | 2258 | 2357 | 2465 | 2542 | 2626 | 2726 | 2864 | 3003 | 3156 | 3279 | 3502 | 3747 | 3939 | 4062 | 4131 | 4385 | 4738 | 5506 |
Better Fuel Economy Factory Ratios Increased Power
