Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/30-21 | 295/44-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.2 (716.4) | 31.22 (793) | 3.02 (76.6) 10.7% |
| Width inches (mm) | 12.01 (305) | 11.61 (295) | -0.39 (-10) -3.3% |
| Circum. inches (mm) | 88.61 (2250.64) | 98.08 (2491.28) | 9.47 (240.65) 10.7% |
| Sidewall Height inches (mm) | 3.6 (91.5) | 5.11 (129.8) | 1.51 (38.3) 41.9% |
| Revolutions per mile (km) | 715.06 (444.32) | 645.99 (401.4) | -69.07 (-42.92) -9.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.14 mph (35.63 km/h) |
| 25 mph (40.23 km/h) | 27.67 mph (44.54 km/h) |
| 30 mph (48.28 km/h) | 33.21 mph (53.44 km/h) |
| 35 mph (56.33 km/h) | 38.74 mph (62.35 km/h) |
| 40 mph (64.37 km/h) | 44.28 mph (71.26 km/h) |
| 45 mph (72.42 km/h) | 49.81 mph (80.16 km/h) |
| 50 mph (80.47 km/h) | 55.35 mph (89.07 km/h) |
| 55 mph (88.51 km/h) | 60.88 mph (97.98 km/h) |
| 60 mph (96.56 km/h) | 66.42 mph (106.89 km/h) |
| 65 mph (104.61 km/h) | 71.95 mph (115.79 km/h) |
| 70 mph (112.65 km/h) | 77.48 mph (124.7 km/h) |
| 75 mph (120.7 km/h) | 83.02 mph (133.61 km/h) |
| 80 mph (128.75 km/h) | 88.55 mph (142.51 km/h) |
| 85 mph (136.79 km/h) | 94.09 mph (151.42 km/h) |
| 90 mph (144.84 km/h) | 99.62 mph (160.33 km/h) |
| 95 mph (152.89 km/h) | 105.16 mph (169.24 km/h) |
| 100 mph (160.93 km/h) | 110.69 mph (178.14 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1644 | 1910 | 2057 | 2148 | 2246 | 2315 | 2392 | 2483 | 2609 | 2735 | 2875 | 2987 | 3190 | 3414 | 3589 | 3701 | 3764 | 3994 | 4316 | 5016 |
Better Fuel Economy Factory Ratios Increased Power
