Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
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185/65r14 vs 195/70r14 Tire Comparison Side By Side
  185/65-14 195/70-14 Difference
Diameter inches (mm) 23.47 (596.1) 24.75 (628.6) 1.28 (32.5) 5.5%
Width inches (mm) 7.28 (185) 7.68 (195) 0.39 (10) 5.4%
Circum. inches (mm) 73.73 (1872.7) 77.75 (1974.81) 4.02 (102.1) 5.5%
Sidewall Height inches (mm) 4.73 (120.25) 5.37 (136.5) 0.64 (16.25) 13.5%
Revolutions per mile (km) 859.37 (533.99) 814.94 (506.38) -44.43 (-27.61) -5.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.09 mph (33.94 km/h)
25 mph (40.23 km/h)26.36 mph (42.43 km/h)
30 mph (48.28 km/h)31.64 mph (50.91 km/h)
35 mph (56.33 km/h)36.91 mph (59.4 km/h)
40 mph (64.37 km/h)42.18 mph (67.88 km/h)
45 mph (72.42 km/h)47.45 mph (76.37 km/h)
50 mph (80.47 km/h)52.73 mph (84.85 km/h)
55 mph (88.51 km/h)58 mph (93.34 km/h)
60 mph (96.56 km/h)63.27 mph (101.83 km/h)
65 mph (104.61 km/h)68.54 mph (110.31 km/h)
70 mph (112.65 km/h)73.82 mph (118.8 km/h)
75 mph (120.7 km/h)79.09 mph (127.28 km/h)
80 mph (128.75 km/h)84.36 mph (135.77 km/h)
85 mph (136.79 km/h)89.63 mph (144.25 km/h)
90 mph (144.84 km/h)94.91 mph (152.74 km/h)
95 mph (152.89 km/h)100.18 mph (161.22 km/h)
100 mph (160.93 km/h)105.45 mph (169.71 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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