Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/30-21 | 295/55-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.97 (710.4) | 33.78 (857.9) | 5.81 (147.5) 20.8% |
| Width inches (mm) | 11.61 (295) | 11.61 (295) | 0 (0) 0% |
| Circum. inches (mm) | 87.87 (2231.79) | 106.11 (2695.17) | 18.24 (463.38) 20.8% |
| Sidewall Height inches (mm) | 3.48 (88.5) | 6.39 (162.25) | 2.9 (73.75) 83.3% |
| Revolutions per mile (km) | 721.1 (448.07) | 597.12 (371.03) | -123.98 (-77.04) -17.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.15 mph (38.87 km/h) |
| 25 mph (40.23 km/h) | 30.19 mph (48.59 km/h) |
| 30 mph (48.28 km/h) | 36.23 mph (58.3 km/h) |
| 35 mph (56.33 km/h) | 42.27 mph (68.02 km/h) |
| 40 mph (64.37 km/h) | 48.31 mph (77.74 km/h) |
| 45 mph (72.42 km/h) | 54.34 mph (87.46 km/h) |
| 50 mph (80.47 km/h) | 60.38 mph (97.17 km/h) |
| 55 mph (88.51 km/h) | 66.42 mph (106.89 km/h) |
| 60 mph (96.56 km/h) | 72.46 mph (116.61 km/h) |
| 65 mph (104.61 km/h) | 78.5 mph (126.33 km/h) |
| 70 mph (112.65 km/h) | 84.53 mph (136.04 km/h) |
| 75 mph (120.7 km/h) | 90.57 mph (145.76 km/h) |
| 80 mph (128.75 km/h) | 96.61 mph (155.48 km/h) |
| 85 mph (136.79 km/h) | 102.65 mph (165.2 km/h) |
| 90 mph (144.84 km/h) | 108.69 mph (174.91 km/h) |
| 95 mph (152.89 km/h) | 114.72 mph (184.63 km/h) |
| 100 mph (160.93 km/h) | 120.76 mph (194.35 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1520 | 1765 | 1901 | 1985 | 2076 | 2140 | 2211 | 2296 | 2412 | 2528 | 2658 | 2761 | 2949 | 3156 | 3317 | 3421 | 3479 | 3692 | 3990 | 4636 |
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