Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/50r13 vs 205/60r13 Tire Comparison Side By Side
  195/50-13 205/60-13 Difference
Diameter inches (mm) 20.68 (525.2) 22.69 (576.2) 2.01 (51) 9.7%
Width inches (mm) 7.68 (195) 8.07 (205) 0.39 (10) 5.1%
Circum. inches (mm) 64.96 (1649.96) 71.27 (1810.19) 6.31 (160.22) 9.7%
Sidewall Height inches (mm) 3.84 (97.5) 4.84 (123) 1 (25.5) 26.2%
Revolutions per mile (km) 975.38 (606.07) 889.05 (552.43) -86.33 (-53.64) -8.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.94 mph (35.31 km/h)
25 mph (40.23 km/h)27.43 mph (44.14 km/h)
30 mph (48.28 km/h)32.91 mph (52.97 km/h)
35 mph (56.33 km/h)38.4 mph (61.8 km/h)
40 mph (64.37 km/h)43.88 mph (70.62 km/h)
45 mph (72.42 km/h)49.37 mph (79.45 km/h)
50 mph (80.47 km/h)54.86 mph (88.28 km/h)
55 mph (88.51 km/h)60.34 mph (97.11 km/h)
60 mph (96.56 km/h)65.83 mph (105.94 km/h)
65 mph (104.61 km/h)71.31 mph (114.77 km/h)
70 mph (112.65 km/h)76.8 mph (123.59 km/h)
75 mph (120.7 km/h)82.28 mph (132.42 km/h)
80 mph (128.75 km/h)87.77 mph (141.25 km/h)
85 mph (136.79 km/h)93.25 mph (150.08 km/h)
90 mph (144.84 km/h)98.74 mph (158.91 km/h)
95 mph (152.89 km/h)104.23 mph (167.73 km/h)
100 mph (160.93 km/h)109.71 mph (176.56 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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