Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
190/100r16 vs 205/80r16 Tire Comparison Side By Side
  190/100-16 205/80-16 Difference
Diameter inches (mm) 30.96 (786.4) 28.91 (734.4) -2.05 (-52) -6.6%
Width inches (mm) 7.48 (190) 8.07 (205) 0.59 (15) 7.9%
Circum. inches (mm) 97.27 (2470.55) 90.83 (2307.19) -6.43 (-163.36) -6.6%
Sidewall Height inches (mm) 7.48 (190) 6.46 (164) -1.02 (-26) -13.7%
Revolutions per mile (km) 651.41 (404.77) 697.54 (433.43) 46.12 (28.66) 7.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.68 mph (30.06 km/h)
25 mph (40.23 km/h)23.35 mph (37.57 km/h)
30 mph (48.28 km/h)28.02 mph (45.09 km/h)
35 mph (56.33 km/h)32.69 mph (52.6 km/h)
40 mph (64.37 km/h)37.36 mph (60.12 km/h)
45 mph (72.42 km/h)42.02 mph (67.63 km/h)
50 mph (80.47 km/h)46.69 mph (75.15 km/h)
55 mph (88.51 km/h)51.36 mph (82.66 km/h)
60 mph (96.56 km/h)56.03 mph (90.18 km/h)
65 mph (104.61 km/h)60.7 mph (97.69 km/h)
70 mph (112.65 km/h)65.37 mph (105.21 km/h)
75 mph (120.7 km/h)70.04 mph (112.72 km/h)
80 mph (128.75 km/h)74.71 mph (120.23 km/h)
85 mph (136.79 km/h)79.38 mph (127.75 km/h)
90 mph (144.84 km/h)84.05 mph (135.26 km/h)
95 mph (152.89 km/h)88.72 mph (142.78 km/h)
100 mph (160.93 km/h)93.39 mph (150.29 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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