Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/55r17 vs 225/55r17 Tire Comparison Side By Side
  205/55-17 225/55-17 Difference
Diameter inches (mm) 25.88 (657.3) 26.74 (679.3) 0.87 (22) 3.3%
Width inches (mm) 8.07 (205) 8.86 (225) 0.79 (20) 9.8%
Circum. inches (mm) 81.3 (2064.97) 84.02 (2134.08) 2.72 (69.12) 3.3%
Sidewall Height inches (mm) 4.44 (112.75) 4.87 (123.75) 0.43 (11) 9.8%
Revolutions per mile (km) 779.36 (484.27) 754.11 (468.58) -25.24 (-15.68) -3.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.67 mph (33.26 km/h)
25 mph (40.23 km/h)25.84 mph (41.58 km/h)
30 mph (48.28 km/h)31 mph (49.9 km/h)
35 mph (56.33 km/h)36.17 mph (58.21 km/h)
40 mph (64.37 km/h)41.34 mph (66.53 km/h)
45 mph (72.42 km/h)46.51 mph (74.84 km/h)
50 mph (80.47 km/h)51.67 mph (83.16 km/h)
55 mph (88.51 km/h)56.84 mph (91.48 km/h)
60 mph (96.56 km/h)62.01 mph (99.79 km/h)
65 mph (104.61 km/h)67.18 mph (108.11 km/h)
70 mph (112.65 km/h)72.34 mph (116.42 km/h)
75 mph (120.7 km/h)77.51 mph (124.74 km/h)
80 mph (128.75 km/h)82.68 mph (133.06 km/h)
85 mph (136.79 km/h)87.84 mph (141.37 km/h)
90 mph (144.84 km/h)93.01 mph (149.69 km/h)
95 mph (152.89 km/h)98.18 mph (158.01 km/h)
100 mph (160.93 km/h)103.35 mph (166.32 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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