Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/50r14 vs 215/35r14 Tire Comparison Side By Side
  225/50-14 215/35-14 Difference
Diameter inches (mm) 22.86 (580.6) 19.93 (506.1) -2.93 (-74.5) -12.8%
Width inches (mm) 8.86 (225) 8.46 (215) -0.39 (-10) -4.4%
Circum. inches (mm) 71.81 (1824.01) 62.6 (1589.96) -9.21 (-234.05) -12.8%
Sidewall Height inches (mm) 4.43 (112.5) 2.96 (75.25) -1.47 (-37.25) -33.1%
Revolutions per mile (km) 882.31 (548.24) 1012.19 (628.95) 129.88 (80.7) 14.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.43 mph (28.06 km/h)
25 mph (40.23 km/h)21.79 mph (35.07 km/h)
30 mph (48.28 km/h)26.15 mph (42.09 km/h)
35 mph (56.33 km/h)30.51 mph (49.1 km/h)
40 mph (64.37 km/h)34.87 mph (56.11 km/h)
45 mph (72.42 km/h)39.23 mph (63.13 km/h)
50 mph (80.47 km/h)43.58 mph (70.14 km/h)
55 mph (88.51 km/h)47.94 mph (77.16 km/h)
60 mph (96.56 km/h)52.3 mph (84.17 km/h)
65 mph (104.61 km/h)56.66 mph (91.18 km/h)
70 mph (112.65 km/h)61.02 mph (98.2 km/h)
75 mph (120.7 km/h)65.38 mph (105.21 km/h)
80 mph (128.75 km/h)69.73 mph (112.23 km/h)
85 mph (136.79 km/h)74.09 mph (119.24 km/h)
90 mph (144.84 km/h)78.45 mph (126.26 km/h)
95 mph (152.89 km/h)82.81 mph (133.27 km/h)
100 mph (160.93 km/h)87.17 mph (140.28 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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