Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
220/70r14 vs 195/70r14 Tire Comparison Side By Side
  220/70-14 195/70-14 Difference
Diameter inches (mm) 26.13 (663.6) 24.75 (628.6) -1.38 (-35) -5.3%
Width inches (mm) 8.66 (220) 7.68 (195) -0.98 (-25) -11.4%
Circum. inches (mm) 82.08 (2084.76) 77.75 (1974.81) -4.33 (-109.96) -5.3%
Sidewall Height inches (mm) 6.06 (154) 5.37 (136.5) -0.69 (-17.5) -11.4%
Revolutions per mile (km) 771.96 (479.67) 814.94 (506.38) 42.98 (26.71) 5.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.95 mph (30.49 km/h)
25 mph (40.23 km/h)23.68 mph (38.11 km/h)
30 mph (48.28 km/h)28.42 mph (45.73 km/h)
35 mph (56.33 km/h)33.15 mph (53.36 km/h)
40 mph (64.37 km/h)37.89 mph (60.98 km/h)
45 mph (72.42 km/h)42.63 mph (68.6 km/h)
50 mph (80.47 km/h)47.36 mph (76.22 km/h)
55 mph (88.51 km/h)52.1 mph (83.85 km/h)
60 mph (96.56 km/h)56.84 mph (91.47 km/h)
65 mph (104.61 km/h)61.57 mph (99.09 km/h)
70 mph (112.65 km/h)66.31 mph (106.71 km/h)
75 mph (120.7 km/h)71.04 mph (114.33 km/h)
80 mph (128.75 km/h)75.78 mph (121.96 km/h)
85 mph (136.79 km/h)80.52 mph (129.58 km/h)
90 mph (144.84 km/h)85.25 mph (137.2 km/h)
95 mph (152.89 km/h)89.99 mph (144.82 km/h)
100 mph (160.93 km/h)94.73 mph (152.45 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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