Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
150/70r13 vs 130/60r13 Tire Comparison Side By Side
  150/70-13 130/60-13 Difference
Diameter inches (mm) 21.27 (540.2) 19.14 (486.2) -2.13 (-54) -10%
Width inches (mm) 5.91 (150) 5.12 (130) -0.79 (-20) -13.3%
Circum. inches (mm) 66.81 (1697.09) 60.14 (1527.44) -6.68 (-169.65) -10%
Sidewall Height inches (mm) 4.13 (105) 3.07 (78) -1.06 (-27) -25.7%
Revolutions per mile (km) 948.3 (589.24) 1053.62 (654.69) 105.32 (65.44) 11.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18 mph (28.97 km/h)
25 mph (40.23 km/h)22.5 mph (36.21 km/h)
30 mph (48.28 km/h)27 mph (43.45 km/h)
35 mph (56.33 km/h)31.5 mph (50.7 km/h)
40 mph (64.37 km/h)36 mph (57.94 km/h)
45 mph (72.42 km/h)40.5 mph (65.18 km/h)
50 mph (80.47 km/h)45 mph (72.42 km/h)
55 mph (88.51 km/h)49.5 mph (79.67 km/h)
60 mph (96.56 km/h)54 mph (86.91 km/h)
65 mph (104.61 km/h)58.5 mph (94.15 km/h)
70 mph (112.65 km/h)63 mph (101.39 km/h)
75 mph (120.7 km/h)67.5 mph (108.64 km/h)
80 mph (128.75 km/h)72 mph (115.88 km/h)
85 mph (136.79 km/h)76.5 mph (123.12 km/h)
90 mph (144.84 km/h)81 mph (130.36 km/h)
95 mph (152.89 km/h)85.5 mph (137.6 km/h)
100 mph (160.93 km/h)90 mph (144.85 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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