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 225/60r17 Tire Comparison Side By Side
  215/55-17 225/60-17 Difference
Diameter inches (mm) 26.31 (668.3) 27.63 (701.8) 1.32 (33.5) 5%
Width inches (mm) 8.46 (215) 8.86 (225) 0.39 (10) 4.7%
Circum. inches (mm) 82.66 (2099.53) 86.8 (2204.77) 4.14 (105.24) 5%
Sidewall Height inches (mm) 4.66 (118.25) 5.31 (135) 0.66 (16.75) 14.2%
Revolutions per mile (km) 766.53 (476.3) 729.94 (453.56) -36.59 (-22.74) -4.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21 mph (33.8 km/h)
25 mph (40.23 km/h)26.25 mph (42.25 km/h)
30 mph (48.28 km/h)31.5 mph (50.7 km/h)
35 mph (56.33 km/h)36.75 mph (59.15 km/h)
40 mph (64.37 km/h)42.01 mph (67.6 km/h)
45 mph (72.42 km/h)47.26 mph (76.05 km/h)
50 mph (80.47 km/h)52.51 mph (84.5 km/h)
55 mph (88.51 km/h)57.76 mph (92.95 km/h)
60 mph (96.56 km/h)63.01 mph (101.4 km/h)
65 mph (104.61 km/h)68.26 mph (109.85 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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