Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/40-21 | 305/40-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.29 (769.4) | 30.61 (777.4) | 0.31 (8) 1% |
| Width inches (mm) | 11.61 (295) | 12.01 (305) | 0.39 (10) 3.4% |
| Circum. inches (mm) | 95.16 (2417.14) | 96.15 (2442.27) | 0.99 (25.13) 1% |
| Sidewall Height inches (mm) | 4.65 (118) | 4.8 (122) | 0.16 (4) 3.4% |
| Revolutions per mile (km) | 665.8 (413.71) | 658.95 (409.45) | -6.85 (-4.26) -1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.21 mph (32.52 km/h) |
| 25 mph (40.23 km/h) | 25.26 mph (40.65 km/h) |
| 30 mph (48.28 km/h) | 30.31 mph (48.78 km/h) |
| 35 mph (56.33 km/h) | 35.36 mph (56.91 km/h) |
| 40 mph (64.37 km/h) | 40.42 mph (65.04 km/h) |
| 45 mph (72.42 km/h) | 45.47 mph (73.17 km/h) |
| 50 mph (80.47 km/h) | 50.52 mph (81.3 km/h) |
| 55 mph (88.51 km/h) | 55.57 mph (89.43 km/h) |
| 60 mph (96.56 km/h) | 60.62 mph (97.56 km/h) |
| 65 mph (104.61 km/h) | 65.68 mph (105.7 km/h) |
| 70 mph (112.65 km/h) | 70.73 mph (113.83 km/h) |
| 75 mph (120.7 km/h) | 75.78 mph (121.96 km/h) |
| 80 mph (128.75 km/h) | 80.83 mph (130.09 km/h) |
| 85 mph (136.79 km/h) | 85.88 mph (138.22 km/h) |
| 90 mph (144.84 km/h) | 90.94 mph (146.35 km/h) |
| 95 mph (152.89 km/h) | 95.99 mph (154.48 km/h) |
| 100 mph (160.93 km/h) | 101.04 mph (162.61 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1677 | 1948 | 2098 | 2191 | 2291 | 2362 | 2440 | 2533 | 2662 | 2790 | 2933 | 3047 | 3254 | 3482 | 3661 | 3775 | 3839 | 4075 | 4403 | 5116 |
Better Fuel Economy Factory Ratios Increased Power
