Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/80r14 vs 225/70r14 Tire Comparison Side By Side
  215/80-14 225/70-14 Difference
Diameter inches (mm) 27.54 (699.6) 26.4 (670.6) -1.14 (-29) -4.1%
Width inches (mm) 8.46 (215) 8.86 (225) 0.39 (10) 4.7%
Circum. inches (mm) 86.53 (2197.86) 82.94 (2106.75) -3.59 (-91.11) -4.1%
Sidewall Height inches (mm) 6.77 (172) 6.2 (157.5) -0.57 (-14.5) -8.4%
Revolutions per mile (km) 732.23 (454.99) 763.9 (474.66) 31.67 (19.68) 4.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.17 mph (30.85 km/h)
25 mph (40.23 km/h)23.96 mph (38.57 km/h)
30 mph (48.28 km/h)28.76 mph (46.28 km/h)
35 mph (56.33 km/h)33.55 mph (53.99 km/h)
40 mph (64.37 km/h)38.34 mph (61.71 km/h)
45 mph (72.42 km/h)43.13 mph (69.42 km/h)
50 mph (80.47 km/h)47.93 mph (77.13 km/h)
55 mph (88.51 km/h)52.72 mph (84.84 km/h)
60 mph (96.56 km/h)57.51 mph (92.56 km/h)
65 mph (104.61 km/h)62.31 mph (100.27 km/h)
70 mph (112.65 km/h)67.1 mph (107.98 km/h)
75 mph (120.7 km/h)71.89 mph (115.7 km/h)
80 mph (128.75 km/h)76.68 mph (123.41 km/h)
85 mph (136.79 km/h)81.48 mph (131.12 km/h)
90 mph (144.84 km/h)86.27 mph (138.84 km/h)
95 mph (152.89 km/h)91.06 mph (146.55 km/h)
100 mph (160.93 km/h)95.85 mph (154.26 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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