Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/55r16 vs 215/60r16 Tire Comparison Side By Side
  225/55-16 215/60-16 Difference
Diameter inches (mm) 25.74 (653.9) 26.16 (664.4) 0.41 (10.5) 1.6%
Width inches (mm) 8.86 (225) 8.46 (215) -0.39 (-10) -4.4%
Circum. inches (mm) 80.88 (2054.29) 82.18 (2087.27) 1.3 (32.99) 1.6%
Sidewall Height inches (mm) 4.87 (123.75) 5.08 (129) 0.21 (5.25) 4.2%
Revolutions per mile (km) 783.41 (486.79) 771.03 (479.09) -12.38 (-7.69) -1.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.32 mph (32.7 km/h)
25 mph (40.23 km/h)25.4 mph (40.88 km/h)
30 mph (48.28 km/h)30.48 mph (49.06 km/h)
35 mph (56.33 km/h)35.56 mph (57.23 km/h)
40 mph (64.37 km/h)40.64 mph (65.41 km/h)
45 mph (72.42 km/h)45.72 mph (73.58 km/h)
50 mph (80.47 km/h)50.8 mph (81.76 km/h)
55 mph (88.51 km/h)55.88 mph (89.94 km/h)
60 mph (96.56 km/h)60.96 mph (98.11 km/h)
65 mph (104.61 km/h)66.04 mph (106.29 km/h)
70 mph (112.65 km/h)71.12 mph (114.46 km/h)
75 mph (120.7 km/h)76.2 mph (122.64 km/h)
80 mph (128.75 km/h)81.28 mph (130.82 km/h)
85 mph (136.79 km/h)86.36 mph (138.99 km/h)
90 mph (144.84 km/h)91.45 mph (147.17 km/h)
95 mph (152.89 km/h)96.53 mph (155.34 km/h)
100 mph (160.93 km/h)101.61 mph (163.52 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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