Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/60r17 vs 235/55r17 Tire Comparison Side By Side
  225/60-17 235/55-17 Difference
Diameter inches (mm) 27.63 (701.8) 27.18 (690.3) -0.45 (-11.5) -1.6%
Width inches (mm) 8.86 (225) 9.25 (235) 0.39 (10) 4.4%
Circum. inches (mm) 86.8 (2204.77) 85.38 (2168.64) -1.42 (-36.13) -1.6%
Sidewall Height inches (mm) 5.31 (135) 5.09 (129.25) -0.23 (-5.75) -4.3%
Revolutions per mile (km) 729.94 (453.56) 742.1 (461.12) 12.16 (7.56) 1.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.67 mph (31.66 km/h)
25 mph (40.23 km/h)24.59 mph (39.57 km/h)
30 mph (48.28 km/h)29.51 mph (47.49 km/h)
35 mph (56.33 km/h)34.43 mph (55.4 km/h)
40 mph (64.37 km/h)39.34 mph (63.32 km/h)
45 mph (72.42 km/h)44.26 mph (71.23 km/h)
50 mph (80.47 km/h)49.18 mph (79.15 km/h)
55 mph (88.51 km/h)54.1 mph (87.06 km/h)
60 mph (96.56 km/h)59.02 mph (94.98 km/h)
65 mph (104.61 km/h)63.93 mph (102.89 km/h)
70 mph (112.65 km/h)68.85 mph (110.81 km/h)
75 mph (120.7 km/h)73.77 mph (118.72 km/h)
80 mph (128.75 km/h)78.69 mph (126.64 km/h)
85 mph (136.79 km/h)83.61 mph (134.55 km/h)
90 mph (144.84 km/h)88.53 mph (142.47 km/h)
95 mph (152.89 km/h)93.44 mph (150.38 km/h)
100 mph (160.93 km/h)98.36 mph (158.3 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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