Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
175/70r13 vs 175/65r14 Tire Comparison Side By Side
  175/70-13 175/65-14 Difference
Diameter inches (mm) 22.65 (575.2) 22.96 (583.1) 0.31 (7.9) 1.4%
Width inches (mm) 6.89 (175) 6.89 (175) 0 (0) 0%
Circum. inches (mm) 71.14 (1807.04) 72.12 (1831.86) 0.98 (24.82) 1.4%
Sidewall Height inches (mm) 4.82 (122.5) 4.48 (113.75) -0.34 (-8.75) -7.1%
Revolutions per mile (km) 890.59 (553.39) 878.53 (545.89) -12.07 (-7.5) -1.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.27 mph (32.63 km/h)
25 mph (40.23 km/h)25.34 mph (40.79 km/h)
30 mph (48.28 km/h)30.41 mph (48.94 km/h)
35 mph (56.33 km/h)35.48 mph (57.1 km/h)
40 mph (64.37 km/h)40.55 mph (65.26 km/h)
45 mph (72.42 km/h)45.62 mph (73.42 km/h)
50 mph (80.47 km/h)50.69 mph (81.57 km/h)
55 mph (88.51 km/h)55.76 mph (89.73 km/h)
60 mph (96.56 km/h)60.82 mph (97.89 km/h)
65 mph (104.61 km/h)65.89 mph (106.04 km/h)
70 mph (112.65 km/h)70.96 mph (114.2 km/h)
75 mph (120.7 km/h)76.03 mph (122.36 km/h)
80 mph (128.75 km/h)81.1 mph (130.52 km/h)
85 mph (136.79 km/h)86.17 mph (138.67 km/h)
90 mph (144.84 km/h)91.24 mph (146.83 km/h)
95 mph (152.89 km/h)96.3 mph (154.99 km/h)
100 mph (160.93 km/h)101.37 mph (163.15 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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