Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/75r14 vs 205/75r14 Tire Comparison Side By Side
  215/75-14 205/75-14 Difference
Diameter inches (mm) 26.7 (678.1) 26.11 (663.1) -0.59 (-15) -2.2%
Width inches (mm) 8.46 (215) 8.07 (205) -0.39 (-10) -4.7%
Circum. inches (mm) 83.87 (2130.31) 82.02 (2083.19) -1.86 (-47.12) -2.2%
Sidewall Height inches (mm) 6.35 (161.25) 6.05 (153.75) -0.3 (-7.5) -4.7%
Revolutions per mile (km) 755.45 (469.41) 772.54 (480.03) 17.09 (10.62) 2.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.56 mph (31.47 km/h)
25 mph (40.23 km/h)24.45 mph (39.34 km/h)
30 mph (48.28 km/h)29.34 mph (47.21 km/h)
35 mph (56.33 km/h)34.23 mph (55.08 km/h)
40 mph (64.37 km/h)39.12 mph (62.95 km/h)
45 mph (72.42 km/h)44 mph (70.82 km/h)
50 mph (80.47 km/h)48.89 mph (78.69 km/h)
55 mph (88.51 km/h)53.78 mph (86.56 km/h)
60 mph (96.56 km/h)58.67 mph (94.42 km/h)
65 mph (104.61 km/h)63.56 mph (102.29 km/h)
70 mph (112.65 km/h)68.45 mph (110.16 km/h)
75 mph (120.7 km/h)73.34 mph (118.03 km/h)
80 mph (128.75 km/h)78.23 mph (125.9 km/h)
85 mph (136.79 km/h)83.12 mph (133.77 km/h)
90 mph (144.84 km/h)88.01 mph (141.64 km/h)
95 mph (152.89 km/h)92.9 mph (149.51 km/h)
100 mph (160.93 km/h)97.79 mph (157.37 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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