Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/75r14 vs 205/75r14 Tire Comparison Side By Side
  225/75-14 205/75-14 Difference
Diameter inches (mm) 27.29 (693.1) 26.11 (663.1) -1.18 (-30) -4.3%
Width inches (mm) 8.86 (225) 8.07 (205) -0.79 (-20) -8.9%
Circum. inches (mm) 85.73 (2177.44) 82.02 (2083.19) -3.71 (-94.25) -4.3%
Sidewall Height inches (mm) 6.64 (168.75) 6.05 (153.75) -0.59 (-15) -8.9%
Revolutions per mile (km) 739.1 (459.25) 772.54 (480.03) 33.44 (20.78) 4.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.13 mph (30.79 km/h)
25 mph (40.23 km/h)23.92 mph (38.49 km/h)
30 mph (48.28 km/h)28.7 mph (46.19 km/h)
35 mph (56.33 km/h)33.49 mph (53.89 km/h)
40 mph (64.37 km/h)38.27 mph (61.59 km/h)
45 mph (72.42 km/h)43.05 mph (69.29 km/h)
50 mph (80.47 km/h)47.84 mph (76.98 km/h)
55 mph (88.51 km/h)52.62 mph (84.68 km/h)
60 mph (96.56 km/h)57.4 mph (92.38 km/h)
65 mph (104.61 km/h)62.19 mph (100.08 km/h)
70 mph (112.65 km/h)66.97 mph (107.78 km/h)
75 mph (120.7 km/h)71.75 mph (115.48 km/h)
80 mph (128.75 km/h)76.54 mph (123.18 km/h)
85 mph (136.79 km/h)81.32 mph (130.87 km/h)
90 mph (144.84 km/h)86.1 mph (138.57 km/h)
95 mph (152.89 km/h)90.89 mph (146.27 km/h)
100 mph (160.93 km/h)95.67 mph (153.97 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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