Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/35-21 | 305/30-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.13 (739.9) | 28.2 (716.4) | -0.93 (-23.5) -3.2% |
| Width inches (mm) | 11.61 (295) | 12.01 (305) | 0.39 (10) 3.4% |
| Circum. inches (mm) | 91.51 (2324.46) | 88.61 (2250.64) | -2.91 (-73.83) -3.2% |
| Sidewall Height inches (mm) | 4.06 (103.25) | 3.6 (91.5) | -0.46 (-11.75) -11.4% |
| Revolutions per mile (km) | 692.35 (430.21) | 715.06 (444.32) | 22.71 (14.11) 3.3% |
305/30-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.36 mph (31.16 km/h) |
| 25 mph (40.23 km/h) | 24.21 mph (38.96 km/h) |
| 30 mph (48.28 km/h) | 29.05 mph (46.75 km/h) |
| 35 mph (56.33 km/h) | 33.89 mph (54.54 km/h) |
| 40 mph (64.37 km/h) | 38.73 mph (62.33 km/h) |
| 45 mph (72.42 km/h) | 43.57 mph (70.12 km/h) |
| 50 mph (80.47 km/h) | 48.41 mph (77.91 km/h) |
| 55 mph (88.51 km/h) | 53.25 mph (85.7 km/h) |
| 60 mph (96.56 km/h) | 58.09 mph (93.49 km/h) |
| 65 mph (104.61 km/h) | 62.94 mph (101.29 km/h) |
| 70 mph (112.65 km/h) | 67.78 mph (109.08 km/h) |
| 75 mph (120.7 km/h) | 72.62 mph (116.87 km/h) |
| 80 mph (128.75 km/h) | 77.46 mph (124.66 km/h) |
| 85 mph (136.79 km/h) | 82.3 mph (132.45 km/h) |
| 90 mph (144.84 km/h) | 87.14 mph (140.24 km/h) |
| 95 mph (152.89 km/h) | 91.98 mph (148.03 km/h) |
| 100 mph (160.93 km/h) | 96.82 mph (155.82 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1820 | 2114 | 2277 | 2377 | 2486 | 2563 | 2648 | 2749 | 2888 | 3028 | 3183 | 3306 | 3531 | 3779 | 3972 | 4096 | 4166 | 4421 | 4778 | 5552 |
Better Fuel Economy Factory Ratios Increased Power
