Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/30-21 | 255/30-22 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.02 (686.4) | 28.02 (711.8) | 1 (25.4) 3.7% |
| Width inches (mm) | 10.04 (255) | 10.04 (255) | 0 (0) 0% |
| Circum. inches (mm) | 84.9 (2156.39) | 88.04 (2236.19) | 3.14 (79.8) 3.7% |
| Sidewall Height inches (mm) | 3.01 (76.5) | 3.01 (76.5) | 0 (0) 0% |
| Revolutions per mile (km) | 746.31 (463.74) | 719.68 (447.19) | -26.63 (-16.55) -3.6% |
255/30-22 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.74 mph (33.38 km/h) |
| 25 mph (40.23 km/h) | 25.93 mph (41.72 km/h) |
| 30 mph (48.28 km/h) | 31.11 mph (50.07 km/h) |
| 35 mph (56.33 km/h) | 36.3 mph (58.41 km/h) |
| 40 mph (64.37 km/h) | 41.48 mph (66.76 km/h) |
| 45 mph (72.42 km/h) | 46.67 mph (75.1 km/h) |
| 50 mph (80.47 km/h) | 51.85 mph (83.45 km/h) |
| 55 mph (88.51 km/h) | 57.04 mph (91.79 km/h) |
| 60 mph (96.56 km/h) | 62.22 mph (100.13 km/h) |
| 65 mph (104.61 km/h) | 67.41 mph (108.48 km/h) |
| 70 mph (112.65 km/h) | 72.59 mph (116.82 km/h) |
| 75 mph (120.7 km/h) | 77.78 mph (125.17 km/h) |
| 80 mph (128.75 km/h) | 82.96 mph (133.51 km/h) |
| 85 mph (136.79 km/h) | 88.15 mph (141.86 km/h) |
| 90 mph (144.84 km/h) | 93.33 mph (150.2 km/h) |
| 95 mph (152.89 km/h) | 98.52 mph (158.55 km/h) |
| 100 mph (160.93 km/h) | 103.7 mph (166.89 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1831 | 2128 | 2291 | 2393 | 2502 | 2580 | 2665 | 2767 | 2907 | 3047 | 3203 | 3328 | 3554 | 3803 | 3998 | 4123 | 4193 | 4450 | 4809 | 5588 |
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