Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/55r17 vs 205/55r16 Tire Comparison Side By Side
  215/55-17 205/55-16 Difference
Diameter inches (mm) 26.31 (668.3) 24.88 (631.9) -1.43 (-36.4) -5.4%
Width inches (mm) 8.46 (215) 8.07 (205) -0.39 (-10) -4.7%
Circum. inches (mm) 82.66 (2099.53) 78.16 (1985.17) -4.5 (-114.35) -5.4%
Sidewall Height inches (mm) 4.66 (118.25) 4.44 (112.75) -0.22 (-5.5) -4.7%
Revolutions per mile (km) 766.53 (476.3) 810.68 (503.73) 44.16 (27.44) 5.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.91 mph (30.43 km/h)
25 mph (40.23 km/h)23.64 mph (38.04 km/h)
30 mph (48.28 km/h)28.37 mph (45.65 km/h)
35 mph (56.33 km/h)33.09 mph (53.26 km/h)
40 mph (64.37 km/h)37.82 mph (60.87 km/h)
45 mph (72.42 km/h)42.55 mph (68.48 km/h)
50 mph (80.47 km/h)47.28 mph (76.08 km/h)
55 mph (88.51 km/h)52 mph (83.69 km/h)
60 mph (96.56 km/h)56.73 mph (91.3 km/h)
65 mph (104.61 km/h)61.46 mph (98.91 km/h)
70 mph (112.65 km/h)66.19 mph (106.52 km/h)
75 mph (120.7 km/h)70.92 mph (114.13 km/h)
80 mph (128.75 km/h)75.64 mph (121.74 km/h)
85 mph (136.79 km/h)80.37 mph (129.34 km/h)
90 mph (144.84 km/h)85.1 mph (136.95 km/h)
95 mph (152.89 km/h)89.83 mph (144.56 km/h)
100 mph (160.93 km/h)94.55 mph (152.17 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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