Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/55r16 vs 245/50r16 Tire Comparison Side By Side
  255/55-16 245/50-16 Difference
Diameter inches (mm) 27.04 (686.9) 25.65 (651.4) -1.4 (-35.5) -5.2%
Width inches (mm) 10.04 (255) 9.65 (245) -0.39 (-10) -3.9%
Circum. inches (mm) 84.96 (2157.96) 80.57 (2046.43) -4.39 (-111.53) -5.2%
Sidewall Height inches (mm) 5.52 (140.25) 4.82 (122.5) -0.7 (-17.75) -12.7%
Revolutions per mile (km) 745.77 (463.4) 786.41 (488.65) 40.64 (25.25) 5.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.97 mph (30.52 km/h)
25 mph (40.23 km/h)23.71 mph (38.15 km/h)
30 mph (48.28 km/h)28.45 mph (45.79 km/h)
35 mph (56.33 km/h)33.19 mph (53.42 km/h)
40 mph (64.37 km/h)37.93 mph (61.05 km/h)
45 mph (72.42 km/h)42.67 mph (68.68 km/h)
50 mph (80.47 km/h)47.42 mph (76.31 km/h)
55 mph (88.51 km/h)52.16 mph (83.94 km/h)
60 mph (96.56 km/h)56.9 mph (91.57 km/h)
65 mph (104.61 km/h)61.64 mph (99.2 km/h)
70 mph (112.65 km/h)66.38 mph (106.83 km/h)
75 mph (120.7 km/h)71.12 mph (114.46 km/h)
80 mph (128.75 km/h)75.87 mph (122.09 km/h)
85 mph (136.79 km/h)80.61 mph (129.72 km/h)
90 mph (144.84 km/h)85.35 mph (137.36 km/h)
95 mph (152.89 km/h)90.09 mph (144.99 km/h)
100 mph (160.93 km/h)94.83 mph (152.62 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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