Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
185/60r14 vs 195/70r14 Tire Comparison Side By Side
  185/60-14 195/70-14 Difference
Diameter inches (mm) 22.74 (577.6) 24.75 (628.6) 2.01 (51) 8.8%
Width inches (mm) 7.28 (185) 7.68 (195) 0.39 (10) 5.4%
Circum. inches (mm) 71.44 (1814.58) 77.75 (1974.81) 6.31 (160.22) 8.8%
Sidewall Height inches (mm) 4.37 (111) 5.37 (136.5) 1 (25.5) 23%
Revolutions per mile (km) 886.89 (551.09) 814.94 (506.38) -71.96 (-44.71) -8.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.77 mph (35.03 km/h)
25 mph (40.23 km/h)27.21 mph (43.79 km/h)
30 mph (48.28 km/h)32.65 mph (52.54 km/h)
35 mph (56.33 km/h)38.09 mph (61.3 km/h)
40 mph (64.37 km/h)43.53 mph (70.06 km/h)
45 mph (72.42 km/h)48.97 mph (78.82 km/h)
50 mph (80.47 km/h)54.41 mph (87.57 km/h)
55 mph (88.51 km/h)59.86 mph (96.33 km/h)
60 mph (96.56 km/h)65.3 mph (105.09 km/h)
65 mph (104.61 km/h)70.74 mph (113.84 km/h)
70 mph (112.65 km/h)76.18 mph (122.6 km/h)
75 mph (120.7 km/h)81.62 mph (131.36 km/h)
80 mph (128.75 km/h)87.06 mph (140.12 km/h)
85 mph (136.79 km/h)92.51 mph (148.87 km/h)
90 mph (144.84 km/h)97.95 mph (157.63 km/h)
95 mph (152.89 km/h)103.39 mph (166.39 km/h)
100 mph (160.93 km/h)108.83 mph (175.14 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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