Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/45r14 vs 155/55r14 Tire Comparison Side By Side
  195/45-14 155/55-14 Difference
Diameter inches (mm) 20.91 (531.1) 20.71 (526.1) -0.2 (-5) -0.9%
Width inches (mm) 7.68 (195) 6.1 (155) -1.57 (-40) -20.5%
Circum. inches (mm) 65.69 (1668.5) 65.07 (1652.79) -0.62 (-15.71) -0.9%
Sidewall Height inches (mm) 3.45 (87.75) 3.36 (85.25) -0.1 (-2.5) -2.8%
Revolutions per mile (km) 964.55 (599.34) 973.71 (605.04) 9.17 (5.7) 1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.81 mph (31.88 km/h)
25 mph (40.23 km/h)24.76 mph (39.85 km/h)
30 mph (48.28 km/h)29.72 mph (47.83 km/h)
35 mph (56.33 km/h)34.67 mph (55.8 km/h)
40 mph (64.37 km/h)39.62 mph (63.77 km/h)
45 mph (72.42 km/h)44.58 mph (71.74 km/h)
50 mph (80.47 km/h)49.53 mph (79.71 km/h)
55 mph (88.51 km/h)54.48 mph (87.68 km/h)
60 mph (96.56 km/h)59.44 mph (95.65 km/h)
65 mph (104.61 km/h)64.39 mph (103.62 km/h)
70 mph (112.65 km/h)69.34 mph (111.59 km/h)
75 mph (120.7 km/h)74.29 mph (119.56 km/h)
80 mph (128.75 km/h)79.25 mph (127.54 km/h)
85 mph (136.79 km/h)84.2 mph (135.51 km/h)
90 mph (144.84 km/h)89.15 mph (143.48 km/h)
95 mph (152.89 km/h)94.11 mph (151.45 km/h)
100 mph (160.93 km/h)99.06 mph (159.42 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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