Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
165/75r14 vs 175/70r14 Tire Comparison Side By Side
  165/75-14 175/70-14 Difference
Diameter inches (mm) 23.74 (603.1) 23.65 (600.6) -0.1 (-2.5) -0.4%
Width inches (mm) 6.5 (165) 6.89 (175) 0.39 (10) 6.1%
Circum. inches (mm) 74.59 (1894.69) 74.29 (1886.84) -0.31 (-7.85) -0.4%
Sidewall Height inches (mm) 4.87 (123.75) 4.82 (122.5) -0.05 (-1.25) -1%
Revolutions per mile (km) 849.39 (527.79) 852.93 (529.99) 3.54 (2.2) 0.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.92 mph (32.05 km/h)
25 mph (40.23 km/h)24.9 mph (40.07 km/h)
30 mph (48.28 km/h)29.88 mph (48.08 km/h)
35 mph (56.33 km/h)34.85 mph (56.09 km/h)
40 mph (64.37 km/h)39.83 mph (64.11 km/h)
45 mph (72.42 km/h)44.81 mph (72.12 km/h)
50 mph (80.47 km/h)49.79 mph (80.13 km/h)
55 mph (88.51 km/h)54.77 mph (88.15 km/h)
60 mph (96.56 km/h)59.75 mph (96.16 km/h)
65 mph (104.61 km/h)64.73 mph (104.17 km/h)
70 mph (112.65 km/h)69.71 mph (112.19 km/h)
75 mph (120.7 km/h)74.69 mph (120.2 km/h)
80 mph (128.75 km/h)79.67 mph (128.21 km/h)
85 mph (136.79 km/h)84.65 mph (136.23 km/h)
90 mph (144.84 km/h)89.63 mph (144.24 km/h)
95 mph (152.89 km/h)94.61 mph (152.25 km/h)
100 mph (160.93 km/h)99.59 mph (160.27 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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