Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/50r17 vs 225/55r17 Tire Comparison Side By Side
  225/50-17 225/55-17 Difference
Diameter inches (mm) 25.86 (656.8) 26.74 (679.3) 0.89 (22.5) 3.4%
Width inches (mm) 8.86 (225) 8.86 (225) 0 (0) 0%
Circum. inches (mm) 81.24 (2063.4) 84.02 (2134.08) 2.78 (70.69) 3.4%
Sidewall Height inches (mm) 4.43 (112.5) 4.87 (123.75) 0.44 (11.25) 10%
Revolutions per mile (km) 779.95 (484.64) 754.11 (468.58) -25.83 (-16.05) -3.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.69 mph (33.29 km/h)
25 mph (40.23 km/h)25.86 mph (41.61 km/h)
30 mph (48.28 km/h)31.03 mph (49.93 km/h)
35 mph (56.33 km/h)36.2 mph (58.26 km/h)
40 mph (64.37 km/h)41.37 mph (66.58 km/h)
45 mph (72.42 km/h)46.54 mph (74.9 km/h)
50 mph (80.47 km/h)51.71 mph (83.22 km/h)
55 mph (88.51 km/h)56.88 mph (91.55 km/h)
60 mph (96.56 km/h)62.06 mph (99.87 km/h)
65 mph (104.61 km/h)67.23 mph (108.19 km/h)
70 mph (112.65 km/h)72.4 mph (116.51 km/h)
75 mph (120.7 km/h)77.57 mph (124.84 km/h)
80 mph (128.75 km/h)82.74 mph (133.16 km/h)
85 mph (136.79 km/h)87.91 mph (141.48 km/h)
90 mph (144.84 km/h)93.08 mph (149.8 km/h)
95 mph (152.89 km/h)98.25 mph (158.13 km/h)
100 mph (160.93 km/h)103.43 mph (166.45 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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