Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/55r19 vs 235/50r19 Tire Comparison Side By Side
  255/55-19 235/50-19 Difference
Diameter inches (mm) 30.04 (763.1) 28.25 (717.6) -1.79 (-45.5) -6%
Width inches (mm) 10.04 (255) 9.25 (235) -0.79 (-20) -7.8%
Circum. inches (mm) 94.38 (2397.35) 88.76 (2254.41) -5.63 (-142.94) -6%
Sidewall Height inches (mm) 5.52 (140.25) 4.63 (117.5) -0.9 (-22.75) -16.2%
Revolutions per mile (km) 671.3 (417.13) 713.87 (443.57) 42.56 (26.45) 6.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.81 mph (30.27 km/h)
25 mph (40.23 km/h)23.51 mph (37.83 km/h)
30 mph (48.28 km/h)28.21 mph (45.4 km/h)
35 mph (56.33 km/h)32.91 mph (52.97 km/h)
40 mph (64.37 km/h)37.61 mph (60.54 km/h)
45 mph (72.42 km/h)42.32 mph (68.1 km/h)
50 mph (80.47 km/h)47.02 mph (75.67 km/h)
55 mph (88.51 km/h)51.72 mph (83.24 km/h)
60 mph (96.56 km/h)56.42 mph (90.8 km/h)
65 mph (104.61 km/h)61.12 mph (98.37 km/h)
70 mph (112.65 km/h)65.83 mph (105.94 km/h)
75 mph (120.7 km/h)70.53 mph (113.5 km/h)
80 mph (128.75 km/h)75.23 mph (121.07 km/h)
85 mph (136.79 km/h)79.93 mph (128.64 km/h)
90 mph (144.84 km/h)84.63 mph (136.21 km/h)
95 mph (152.89 km/h)89.34 mph (143.77 km/h)
100 mph (160.93 km/h)94.04 mph (151.34 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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