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 225/25r14 Tire Comparison Side By Side
  225/50-14 225/25-14 Difference
Diameter inches (mm) 22.86 (580.6) 18.43 (468.1) -4.43 (-112.5) -19.4%
Width inches (mm) 8.86 (225) 8.86 (225) 0 (0) 0%
Circum. inches (mm) 71.81 (1824.01) 57.9 (1470.58) -13.91 (-353.43) -19.4%
Sidewall Height inches (mm) 4.43 (112.5) 2.21 (56.25) -2.21 (-56.25) -50%
Revolutions per mile (km) 882.31 (548.24) 1094.36 (680) 212.05 (131.76) 24%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)16.12 mph (25.95 km/h)
25 mph (40.23 km/h)20.16 mph (32.44 km/h)
30 mph (48.28 km/h)24.19 mph (38.93 km/h)
35 mph (56.33 km/h)28.22 mph (45.41 km/h)
40 mph (64.37 km/h)32.25 mph (51.9 km/h)
45 mph (72.42 km/h)36.28 mph (58.39 km/h)
50 mph (80.47 km/h)40.31 mph (64.88 km/h)
55 mph (88.51 km/h)44.34 mph (71.36 km/h)
60 mph (96.56 km/h)48.37 mph (77.85 km/h)
65 mph (104.61 km/h)52.41 mph (84.34 km/h)
70 mph (112.65 km/h)56.44 mph (90.83 km/h)
75 mph (120.7 km/h)60.47 mph (97.31 km/h)
80 mph (128.75 km/h)64.5 mph (103.8 km/h)
85 mph (136.79 km/h)68.53 mph (110.29 km/h)
90 mph (144.84 km/h)72.56 mph (116.78 km/h)
95 mph (152.89 km/h)76.59 mph (123.26 km/h)
100 mph (160.93 km/h)80.62 mph (129.75 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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