Accepts P-Metric and Inches
245/30-21 | 305/25-22 | Difference | |
---|---|---|---|
Diameter inches (mm) | 26.79 (680.4) | 28 (711.3) | 1.22 (30.9) 4.5% |
Width inches (mm) | 9.65 (245) | 12.01 (305) | 2.36 (60) 24.5% |
Circum. inches (mm) | 84.16 (2137.54) | 87.98 (2234.61) | 3.82 (97.08) 4.5% |
Sidewall Height inches (mm) | 2.89 (73.5) | 3 (76.25) | 0.11 (2.75) 3.7% |
Revolutions per mile (km) | 752.9 (467.83) | 720.19 (447.5) | -32.71 (-20.32) -4.3% |
Speedometer Difference
Speedo Reading | Actual Speed |
---|---|
20 mph (32.19 km/h) | 20.91 mph (33.65 km/h) |
25 mph (40.23 km/h) | 26.14 mph (42.06 km/h) |
30 mph (48.28 km/h) | 31.36 mph (50.47 km/h) |
35 mph (56.33 km/h) | 36.59 mph (58.89 km/h) |
40 mph (64.37 km/h) | 41.82 mph (67.3 km/h) |
45 mph (72.42 km/h) | 47.04 mph (75.71 km/h) |
50 mph (80.47 km/h) | 52.27 mph (84.12 km/h) |
55 mph (88.51 km/h) | 57.5 mph (92.53 km/h) |
60 mph (96.56 km/h) | 62.72 mph (100.95 km/h) |
65 mph (104.61 km/h) | 67.95 mph (109.36 km/h) |
70 mph (112.65 km/h) | 73.18 mph (117.77 km/h) |
75 mph (120.7 km/h) | 78.41 mph (126.18 km/h) |
80 mph (128.75 km/h) | 83.63 mph (134.59 km/h) |
85 mph (136.79 km/h) | 88.86 mph (143.01 km/h) |
90 mph (144.84 km/h) | 94.09 mph (151.42 km/h) |
95 mph (152.89 km/h) | 99.31 mph (159.83 km/h) |
100 mph (160.93 km/h) | 104.54 mph (168.24 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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1833 | 2129 | 2293 | 2394 | 2503 | 2581 | 2667 | 2769 | 2909 | 3049 | 3205 | 3330 | 3556 | 3806 | 4001 | 4126 | 4196 | 4453 | 4812 | 5592 |
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