Accepts P-Metric and Inches
315/30-20 | 305/30-20 | Difference | |
---|---|---|---|
Diameter inches (mm) | 27.44 (697) | 27.2 (691) | -0.24 (-6) -0.9% |
Width inches (mm) | 12.4 (315) | 12.01 (305) | -0.39 (-10) -3.2% |
Circum. inches (mm) | 86.21 (2189.69) | 85.47 (2170.84) | -0.74 (-18.85) -0.9% |
Sidewall Height inches (mm) | 3.72 (94.5) | 3.6 (91.5) | -0.12 (-3) -3.2% |
Revolutions per mile (km) | 734.96 (456.68) | 741.35 (460.65) | 6.38 (3.97) 0.9% |
305/30-20 Tires
Speedometer Difference
Speedo Reading | Actual Speed |
---|---|
20 mph (32.19 km/h) | 19.83 mph (31.91 km/h) |
25 mph (40.23 km/h) | 24.78 mph (39.89 km/h) |
30 mph (48.28 km/h) | 29.74 mph (47.86 km/h) |
35 mph (56.33 km/h) | 34.7 mph (55.84 km/h) |
40 mph (64.37 km/h) | 39.66 mph (63.82 km/h) |
45 mph (72.42 km/h) | 44.61 mph (71.8 km/h) |
50 mph (80.47 km/h) | 49.57 mph (79.77 km/h) |
55 mph (88.51 km/h) | 54.53 mph (87.75 km/h) |
60 mph (96.56 km/h) | 59.48 mph (95.73 km/h) |
65 mph (104.61 km/h) | 64.44 mph (103.71 km/h) |
70 mph (112.65 km/h) | 69.4 mph (111.68 km/h) |
75 mph (120.7 km/h) | 74.35 mph (119.66 km/h) |
80 mph (128.75 km/h) | 79.31 mph (127.64 km/h) |
85 mph (136.79 km/h) | 84.27 mph (135.62 km/h) |
90 mph (144.84 km/h) | 89.23 mph (143.59 km/h) |
95 mph (152.89 km/h) | 94.18 mph (151.57 km/h) |
100 mph (160.93 km/h) | 99.14 mph (159.55 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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1887 | 2192 | 2360 | 2465 | 2577 | 2657 | 2746 | 2850 | 2994 | 3139 | 3300 | 3428 | 3661 | 3918 | 4118 | 4247 | 4319 | 4584 | 4953 | 5756 |
Better Fuel Economy Factory Ratios Increased Power