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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165/70r10 vs 165/60r12 Tire Comparison Side By Side
  165/70-10 165/60-12 Difference
Diameter inches (mm) 19.09 (485) 19.8 (502.8) 0.7 (17.8) 3.7%
Width inches (mm) 6.5 (165) 6.5 (165) 0 (0) 0%
Circum. inches (mm) 59.99 (1523.67) 62.19 (1579.59) 2.2 (55.92) 3.7%
Sidewall Height inches (mm) 4.55 (115.5) 3.9 (99) -0.65 (-16.5) -14.3%
Revolutions per mile (km) 1056.23 (656.31) 1018.83 (633.07) -37.39 (-23.23) -3.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.73 mph (33.37 km/h)
25 mph (40.23 km/h)25.92 mph (41.71 km/h)
30 mph (48.28 km/h)31.1 mph (50.05 km/h)
35 mph (56.33 km/h)36.28 mph (58.39 km/h)
40 mph (64.37 km/h)41.47 mph (66.74 km/h)
45 mph (72.42 km/h)46.65 mph (75.08 km/h)
50 mph (80.47 km/h)51.84 mph (83.42 km/h)
55 mph (88.51 km/h)57.02 mph (91.76 km/h)
60 mph (96.56 km/h)62.2 mph (100.1 km/h)
65 mph (104.61 km/h)67.39 mph (108.45 km/h)
70 mph (112.65 km/h)72.57 mph (116.79 km/h)
75 mph (120.7 km/h)77.75 mph (125.13 km/h)
80 mph (128.75 km/h)82.94 mph (133.47 km/h)
85 mph (136.79 km/h)88.12 mph (141.82 km/h)
90 mph (144.84 km/h)93.3 mph (150.16 km/h)
95 mph (152.89 km/h)98.49 mph (158.5 km/h)
100 mph (160.93 km/h)103.67 mph (166.84 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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