Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
175/75r16 vs 205/55r17 Tire Comparison Side By Side
  175/75-16 205/55-17 Difference
Diameter inches (mm) 26.33 (668.9) 25.88 (657.3) -0.46 (-11.6) -1.7%
Width inches (mm) 6.89 (175) 8.07 (205) 1.18 (30) 17.1%
Circum. inches (mm) 82.73 (2101.41) 81.3 (2064.97) -1.43 (-36.44) -1.7%
Sidewall Height inches (mm) 5.17 (131.25) 4.44 (112.75) -0.73 (-18.5) -14.1%
Revolutions per mile (km) 765.84 (475.87) 779.36 (484.27) 13.52 (8.4) 1.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.65 mph (31.63 km/h)
25 mph (40.23 km/h)24.57 mph (39.54 km/h)
30 mph (48.28 km/h)29.48 mph (47.44 km/h)
35 mph (56.33 km/h)34.39 mph (55.35 km/h)
40 mph (64.37 km/h)39.31 mph (63.26 km/h)
45 mph (72.42 km/h)44.22 mph (71.16 km/h)
50 mph (80.47 km/h)49.13 mph (79.07 km/h)
55 mph (88.51 km/h)54.05 mph (86.98 km/h)
60 mph (96.56 km/h)58.96 mph (94.89 km/h)
65 mph (104.61 km/h)63.87 mph (102.79 km/h)
70 mph (112.65 km/h)68.79 mph (110.7 km/h)
75 mph (120.7 km/h)73.7 mph (118.61 km/h)
80 mph (128.75 km/h)78.61 mph (126.52 km/h)
85 mph (136.79 km/h)83.53 mph (134.42 km/h)
90 mph (144.84 km/h)88.44 mph (142.33 km/h)
95 mph (152.89 km/h)93.35 mph (150.24 km/h)
100 mph (160.93 km/h)98.27 mph (158.14 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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