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 245/60r17 Tire Comparison Side By Side
  225/65-17 245/60-17 Difference
Diameter inches (mm) 28.52 (724.3) 28.57 (725.8) 0.06 (1.5) 0.2%
Width inches (mm) 8.86 (225) 9.65 (245) 0.79 (20) 8.9%
Circum. inches (mm) 89.58 (2275.46) 89.77 (2280.17) 0.19 (4.71) 0.2%
Sidewall Height inches (mm) 5.76 (146.25) 5.79 (147) 0.03 (0.75) 0.5%
Revolutions per mile (km) 707.26 (439.47) 705.8 (438.56) -1.46 (-0.91) -0.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.04 mph (32.25 km/h)
25 mph (40.23 km/h)25.05 mph (40.32 km/h)
30 mph (48.28 km/h)30.06 mph (48.38 km/h)
35 mph (56.33 km/h)35.07 mph (56.44 km/h)
40 mph (64.37 km/h)40.08 mph (64.51 km/h)
45 mph (72.42 km/h)45.09 mph (72.57 km/h)
50 mph (80.47 km/h)50.1 mph (80.63 km/h)
55 mph (88.51 km/h)55.11 mph (88.7 km/h)
60 mph (96.56 km/h)60.12 mph (96.76 km/h)
65 mph (104.61 km/h)65.13 mph (104.82 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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