Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/55r17 vs 225/55r17 Tire Comparison Side By Side
  215/55-17 225/55-17 Difference
Diameter inches (mm) 26.31 (668.3) 26.74 (679.3) 0.43 (11) 1.6%
Width inches (mm) 8.46 (215) 8.86 (225) 0.39 (10) 4.7%
Circum. inches (mm) 82.66 (2099.53) 84.02 (2134.08) 1.36 (34.56) 1.6%
Sidewall Height inches (mm) 4.66 (118.25) 4.87 (123.75) 0.22 (5.5) 4.7%
Revolutions per mile (km) 766.53 (476.3) 754.11 (468.58) -12.41 (-7.71) -1.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.33 mph (32.72 km/h)
25 mph (40.23 km/h)25.41 mph (40.9 km/h)
30 mph (48.28 km/h)30.49 mph (49.08 km/h)
35 mph (56.33 km/h)35.58 mph (57.25 km/h)
40 mph (64.37 km/h)40.66 mph (65.43 km/h)
45 mph (72.42 km/h)45.74 mph (73.61 km/h)
50 mph (80.47 km/h)50.82 mph (81.79 km/h)
55 mph (88.51 km/h)55.91 mph (89.97 km/h)
60 mph (96.56 km/h)60.99 mph (98.15 km/h)
65 mph (104.61 km/h)66.07 mph (106.33 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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