Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/65r17 vs 225/60r17 Tire Comparison Side By Side
  225/65-17 225/60-17 Difference
Diameter inches (mm) 28.52 (724.3) 27.63 (701.8) -0.89 (-22.5) -3.1%
Width inches (mm) 8.86 (225) 8.86 (225) 0 (0) 0%
Circum. inches (mm) 89.58 (2275.46) 86.8 (2204.77) -2.78 (-70.69) -3.1%
Sidewall Height inches (mm) 5.76 (146.25) 5.31 (135) -0.44 (-11.25) -7.7%
Revolutions per mile (km) 707.26 (439.47) 729.94 (453.56) 22.68 (14.09) 3.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.38 mph (31.19 km/h)
25 mph (40.23 km/h)24.22 mph (38.98 km/h)
30 mph (48.28 km/h)29.07 mph (46.78 km/h)
35 mph (56.33 km/h)33.91 mph (54.58 km/h)
40 mph (64.37 km/h)38.76 mph (62.37 km/h)
45 mph (72.42 km/h)43.6 mph (70.17 km/h)
50 mph (80.47 km/h)48.45 mph (77.97 km/h)
55 mph (88.51 km/h)53.29 mph (85.76 km/h)
60 mph (96.56 km/h)58.14 mph (93.56 km/h)
65 mph (104.61 km/h)62.98 mph (101.36 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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