Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/55r17 vs 195/55r16 Tire Comparison Side By Side
  205/55-17 195/55-16 Difference
Diameter inches (mm) 25.88 (657.3) 24.44 (620.9) -1.43 (-36.4) -5.5%
Width inches (mm) 8.07 (205) 7.68 (195) -0.39 (-10) -4.9%
Circum. inches (mm) 81.3 (2064.97) 76.8 (1950.61) -4.5 (-114.35) -5.5%
Sidewall Height inches (mm) 4.44 (112.75) 4.22 (107.25) -0.22 (-5.5) -4.9%
Revolutions per mile (km) 779.36 (484.27) 825.04 (512.66) 45.69 (28.39) 5.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.89 mph (30.4 km/h)
25 mph (40.23 km/h)23.62 mph (38.01 km/h)
30 mph (48.28 km/h)28.34 mph (45.61 km/h)
35 mph (56.33 km/h)33.06 mph (53.21 km/h)
40 mph (64.37 km/h)37.78 mph (60.81 km/h)
45 mph (72.42 km/h)42.51 mph (68.41 km/h)
50 mph (80.47 km/h)47.23 mph (76.01 km/h)
55 mph (88.51 km/h)51.95 mph (83.61 km/h)
60 mph (96.56 km/h)56.68 mph (91.21 km/h)
65 mph (104.61 km/h)61.4 mph (98.81 km/h)
70 mph (112.65 km/h)66.12 mph (106.42 km/h)
75 mph (120.7 km/h)70.85 mph (114.02 km/h)
80 mph (128.75 km/h)75.57 mph (121.62 km/h)
85 mph (136.79 km/h)80.29 mph (129.22 km/h)
90 mph (144.84 km/h)85.02 mph (136.82 km/h)
95 mph (152.89 km/h)89.74 mph (144.42 km/h)
100 mph (160.93 km/h)94.46 mph (152.02 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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