Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
220/60r16 vs 205/45r16 Tire Comparison Side By Side
  220/60-16 205/45-16 Difference
Diameter inches (mm) 26.39 (670.4) 23.26 (590.9) -3.13 (-79.5) -11.9%
Width inches (mm) 8.66 (220) 8.07 (205) -0.59 (-15) -6.8%
Circum. inches (mm) 82.92 (2106.12) 73.09 (1856.37) -9.83 (-249.76) -11.9%
Sidewall Height inches (mm) 5.2 (132) 3.63 (92.25) -1.56 (-39.75) -30.1%
Revolutions per mile (km) 764.13 (474.81) 866.93 (538.69) 102.81 (63.88) 13.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.63 mph (28.37 km/h)
25 mph (40.23 km/h)22.04 mph (35.46 km/h)
30 mph (48.28 km/h)26.44 mph (42.56 km/h)
35 mph (56.33 km/h)30.85 mph (49.65 km/h)
40 mph (64.37 km/h)35.26 mph (56.74 km/h)
45 mph (72.42 km/h)39.66 mph (63.83 km/h)
50 mph (80.47 km/h)44.07 mph (70.93 km/h)
55 mph (88.51 km/h)48.48 mph (78.02 km/h)
60 mph (96.56 km/h)52.88 mph (85.11 km/h)
65 mph (104.61 km/h)57.29 mph (92.2 km/h)
70 mph (112.65 km/h)61.7 mph (99.3 km/h)
75 mph (120.7 km/h)66.11 mph (106.39 km/h)
80 mph (128.75 km/h)70.51 mph (113.48 km/h)
85 mph (136.79 km/h)74.92 mph (120.57 km/h)
90 mph (144.84 km/h)79.33 mph (127.67 km/h)
95 mph (152.89 km/h)83.73 mph (134.76 km/h)
100 mph (160.93 km/h)88.14 mph (141.85 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
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