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 165/60r14 Tire Comparison Side By Side
  165/75-14 165/60-14 Difference
Diameter inches (mm) 23.74 (603.1) 21.8 (553.6) -1.95 (-49.5) -8.2%
Width inches (mm) 6.5 (165) 6.5 (165) 0 (0) 0%
Circum. inches (mm) 74.59 (1894.69) 68.47 (1739.19) -6.12 (-155.51) -8.2%
Sidewall Height inches (mm) 4.87 (123.75) 3.9 (99) -0.97 (-24.75) -20%
Revolutions per mile (km) 849.39 (527.79) 925.34 (574.98) 75.95 (47.19) 8.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.36 mph (29.55 km/h)
25 mph (40.23 km/h)22.95 mph (36.93 km/h)
30 mph (48.28 km/h)27.54 mph (44.32 km/h)
35 mph (56.33 km/h)32.13 mph (51.7 km/h)
40 mph (64.37 km/h)36.72 mph (59.09 km/h)
45 mph (72.42 km/h)41.31 mph (66.48 km/h)
50 mph (80.47 km/h)45.9 mph (73.86 km/h)
55 mph (88.51 km/h)50.49 mph (81.25 km/h)
60 mph (96.56 km/h)55.08 mph (88.64 km/h)
65 mph (104.61 km/h)59.67 mph (96.02 km/h)
70 mph (112.65 km/h)64.25 mph (103.41 km/h)
75 mph (120.7 km/h)68.84 mph (110.79 km/h)
80 mph (128.75 km/h)73.43 mph (118.18 km/h)
85 mph (136.79 km/h)78.02 mph (125.57 km/h)
90 mph (144.84 km/h)82.61 mph (132.95 km/h)
95 mph (152.89 km/h)87.2 mph (140.34 km/h)
100 mph (160.93 km/h)91.79 mph (147.73 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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