Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/45-21 | 305/40-22 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.74 (780.9) | 31.61 (802.8) | 0.86 (21.9) 2.8% |
| Width inches (mm) | 10.83 (275) | 12.01 (305) | 1.18 (30) 10.9% |
| Circum. inches (mm) | 96.59 (2453.27) | 99.29 (2522.07) | 2.71 (68.8) 2.8% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 4.8 (122) | -0.07 (-1.75) -1.4% |
| Revolutions per mile (km) | 656 (407.62) | 638.1 (396.5) | -17.9 (-11.12) -2.7% |
305/40-22 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.56 mph (33.09 km/h) |
| 25 mph (40.23 km/h) | 25.7 mph (41.36 km/h) |
| 30 mph (48.28 km/h) | 30.84 mph (49.63 km/h) |
| 35 mph (56.33 km/h) | 35.98 mph (57.91 km/h) |
| 40 mph (64.37 km/h) | 41.12 mph (66.18 km/h) |
| 45 mph (72.42 km/h) | 46.26 mph (74.45 km/h) |
| 50 mph (80.47 km/h) | 51.4 mph (82.72 km/h) |
| 55 mph (88.51 km/h) | 56.54 mph (91 km/h) |
| 60 mph (96.56 km/h) | 61.68 mph (99.27 km/h) |
| 65 mph (104.61 km/h) | 66.82 mph (107.54 km/h) |
| 70 mph (112.65 km/h) | 71.96 mph (115.81 km/h) |
| 75 mph (120.7 km/h) | 77.1 mph (124.09 km/h) |
| 80 mph (128.75 km/h) | 82.24 mph (132.36 km/h) |
| 85 mph (136.79 km/h) | 87.38 mph (140.63 km/h) |
| 90 mph (144.84 km/h) | 92.52 mph (148.9 km/h) |
| 95 mph (152.89 km/h) | 97.66 mph (157.18 km/h) |
| 100 mph (160.93 km/h) | 102.8 mph (165.45 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1624 | 1886 | 2032 | 2121 | 2218 | 2287 | 2363 | 2453 | 2577 | 2702 | 2840 | 2951 | 3151 | 3372 | 3545 | 3655 | 3718 | 3946 | 4263 | 4954 |
Better Fuel Economy Factory Ratios Increased Power
