Accepts P-Metric and Inches
245/60-20 | 255/55-20 | Difference | |
---|---|---|---|
Diameter inches (mm) | 31.57 (802) | 31.04 (788.5) | -0.53 (-13.5) -1.7% |
Width inches (mm) | 9.65 (245) | 10.04 (255) | 0.39 (10) 4.1% |
Circum. inches (mm) | 99.2 (2519.56) | 97.53 (2477.15) | -1.67 (-42.41) -1.7% |
Sidewall Height inches (mm) | 5.79 (147) | 5.52 (140.25) | -0.27 (-6.75) -4.6% |
Revolutions per mile (km) | 638.74 (396.89) | 649.68 (403.69) | 10.94 (6.8) 1.7% |
255/55-20 Tires
Speedometer Difference
Speedo Reading | Actual Speed |
---|---|
20 mph (32.19 km/h) | 19.66 mph (31.65 km/h) |
25 mph (40.23 km/h) | 24.58 mph (39.56 km/h) |
30 mph (48.28 km/h) | 29.5 mph (47.47 km/h) |
35 mph (56.33 km/h) | 34.41 mph (55.38 km/h) |
40 mph (64.37 km/h) | 39.33 mph (63.29 km/h) |
45 mph (72.42 km/h) | 44.24 mph (71.2 km/h) |
50 mph (80.47 km/h) | 49.16 mph (79.11 km/h) |
55 mph (88.51 km/h) | 54.07 mph (87.02 km/h) |
60 mph (96.56 km/h) | 58.99 mph (94.94 km/h) |
65 mph (104.61 km/h) | 63.91 mph (102.85 km/h) |
70 mph (112.65 km/h) | 68.82 mph (110.76 km/h) |
75 mph (120.7 km/h) | 73.74 mph (118.67 km/h) |
80 mph (128.75 km/h) | 78.65 mph (126.58 km/h) |
85 mph (136.79 km/h) | 83.57 mph (134.49 km/h) |
90 mph (144.84 km/h) | 88.49 mph (142.4 km/h) |
95 mph (152.89 km/h) | 93.4 mph (150.31 km/h) |
100 mph (160.93 km/h) | 98.32 mph (158.23 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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1653 | 1921 | 2068 | 2160 | 2258 | 2329 | 2406 | 2498 | 2624 | 2751 | 2892 | 3004 | 3208 | 3433 | 3609 | 3722 | 3785 | 4017 | 4341 | 5044 |
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