Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/35-21 | 315/30-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.13 (739.9) | 28.44 (722.4) | -0.69 (-17.5) -2.4% |
| Width inches (mm) | 11.61 (295) | 12.4 (315) | 0.79 (20) 6.8% |
| Circum. inches (mm) | 91.51 (2324.46) | 89.35 (2269.49) | -2.16 (-54.98) -2.4% |
| Sidewall Height inches (mm) | 4.06 (103.25) | 3.72 (94.5) | -0.34 (-8.75) -8.5% |
| Revolutions per mile (km) | 692.35 (430.21) | 709.12 (440.63) | 16.77 (10.42) 2.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.53 mph (31.43 km/h) |
| 25 mph (40.23 km/h) | 24.41 mph (39.28 km/h) |
| 30 mph (48.28 km/h) | 29.29 mph (47.14 km/h) |
| 35 mph (56.33 km/h) | 34.17 mph (54.99 km/h) |
| 40 mph (64.37 km/h) | 39.05 mph (62.85 km/h) |
| 45 mph (72.42 km/h) | 43.94 mph (70.71 km/h) |
| 50 mph (80.47 km/h) | 48.82 mph (78.56 km/h) |
| 55 mph (88.51 km/h) | 53.7 mph (86.42 km/h) |
| 60 mph (96.56 km/h) | 58.58 mph (94.28 km/h) |
| 65 mph (104.61 km/h) | 63.46 mph (102.13 km/h) |
| 70 mph (112.65 km/h) | 68.34 mph (109.99 km/h) |
| 75 mph (120.7 km/h) | 73.23 mph (117.85 km/h) |
| 80 mph (128.75 km/h) | 78.11 mph (125.7 km/h) |
| 85 mph (136.79 km/h) | 82.99 mph (133.56 km/h) |
| 90 mph (144.84 km/h) | 87.87 mph (141.42 km/h) |
| 95 mph (152.89 km/h) | 92.75 mph (149.27 km/h) |
| 100 mph (160.93 km/h) | 97.63 mph (157.13 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
