Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
130/60r17 vs 180/55r17 Tire Comparison Side By Side
  130/60-17 180/55-17 Difference
Diameter inches (mm) 23.14 (587.8) 24.8 (629.8) 1.65 (42) 7.1%
Width inches (mm) 5.12 (130) 7.09 (180) 1.97 (50) 38.5%
Circum. inches (mm) 72.7 (1846.63) 77.9 (1978.58) 5.19 (131.95) 7.1%
Sidewall Height inches (mm) 3.07 (78) 3.9 (99) 0.83 (21) 26.9%
Revolutions per mile (km) 871.5 (541.53) 813.39 (505.41) -58.12 (-36.11) -6.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.43 mph (34.49 km/h)
25 mph (40.23 km/h)26.79 mph (43.11 km/h)
30 mph (48.28 km/h)32.14 mph (51.73 km/h)
35 mph (56.33 km/h)37.5 mph (60.35 km/h)
40 mph (64.37 km/h)42.86 mph (68.97 km/h)
45 mph (72.42 km/h)48.22 mph (77.6 km/h)
50 mph (80.47 km/h)53.57 mph (86.22 km/h)
55 mph (88.51 km/h)58.93 mph (94.84 km/h)
60 mph (96.56 km/h)64.29 mph (103.46 km/h)
65 mph (104.61 km/h)69.64 mph (112.08 km/h)
70 mph (112.65 km/h)75 mph (120.7 km/h)
75 mph (120.7 km/h)80.36 mph (129.33 km/h)
80 mph (128.75 km/h)85.72 mph (137.95 km/h)
85 mph (136.79 km/h)91.07 mph (146.57 km/h)
90 mph (144.84 km/h)96.43 mph (155.19 km/h)
95 mph (152.89 km/h)101.79 mph (163.81 km/h)
100 mph (160.93 km/h)107.15 mph (172.43 km/h)

Gear Ratio / RPMs for New Tire (@ 65 mph)
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
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