Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/35r17 vs 205/35r17 Tire Comparison Side By Side
  225/35-17 205/35-17 Difference
Diameter inches (mm) 23.2 (589.3) 22.65 (575.3) -0.55 (-14) -2.4%
Width inches (mm) 8.86 (225) 8.07 (205) -0.79 (-20) -8.9%
Circum. inches (mm) 72.89 (1851.34) 71.16 (1807.36) -1.73 (-43.98) -2.4%
Sidewall Height inches (mm) 3.1 (78.75) 2.82 (71.75) -0.28 (-7) -8.9%
Revolutions per mile (km) 869.29 (540.15) 890.44 (553.29) 21.15 (13.14) 2.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.52 mph (31.42 km/h)
25 mph (40.23 km/h)24.41 mph (39.28 km/h)
30 mph (48.28 km/h)29.29 mph (47.13 km/h)
35 mph (56.33 km/h)34.17 mph (54.99 km/h)
40 mph (64.37 km/h)39.05 mph (62.84 km/h)
45 mph (72.42 km/h)43.93 mph (70.7 km/h)
50 mph (80.47 km/h)48.81 mph (78.56 km/h)
55 mph (88.51 km/h)53.69 mph (86.41 km/h)
60 mph (96.56 km/h)58.57 mph (94.27 km/h)
65 mph (104.61 km/h)63.46 mph (102.12 km/h)
70 mph (112.65 km/h)68.34 mph (109.98 km/h)
75 mph (120.7 km/h)73.22 mph (117.83 km/h)
80 mph (128.75 km/h)78.1 mph (125.69 km/h)
85 mph (136.79 km/h)82.98 mph (133.54 km/h)
90 mph (144.84 km/h)87.86 mph (141.4 km/h)
95 mph (152.89 km/h)92.74 mph (149.26 km/h)
100 mph (160.93 km/h)97.62 mph (157.11 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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