Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/55r16 vs 225/60r16 Tire Comparison Side By Side
  235/55-16 225/60-16 Difference
Diameter inches (mm) 26.18 (664.9) 26.63 (676.4) 0.45 (11.5) 1.7%
Width inches (mm) 9.25 (235) 8.86 (225) -0.39 (-10) -4.3%
Circum. inches (mm) 82.24 (2088.84) 83.66 (2124.97) 1.42 (36.13) 1.7%
Sidewall Height inches (mm) 5.09 (129.25) 5.31 (135) 0.23 (5.75) 4.4%
Revolutions per mile (km) 770.45 (478.73) 757.35 (470.59) -13.1 (-8.14) -1.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.35 mph (32.74 km/h)
25 mph (40.23 km/h)25.43 mph (40.93 km/h)
30 mph (48.28 km/h)30.52 mph (49.12 km/h)
35 mph (56.33 km/h)35.61 mph (57.3 km/h)
40 mph (64.37 km/h)40.69 mph (65.49 km/h)
45 mph (72.42 km/h)45.78 mph (73.67 km/h)
50 mph (80.47 km/h)50.86 mph (81.86 km/h)
55 mph (88.51 km/h)55.95 mph (90.05 km/h)
60 mph (96.56 km/h)61.04 mph (98.23 km/h)
65 mph (104.61 km/h)66.12 mph (106.42 km/h)
70 mph (112.65 km/h)71.21 mph (114.6 km/h)
75 mph (120.7 km/h)76.3 mph (122.79 km/h)
80 mph (128.75 km/h)81.38 mph (130.97 km/h)
85 mph (136.79 km/h)86.47 mph (139.16 km/h)
90 mph (144.84 km/h)91.56 mph (147.35 km/h)
95 mph (152.89 km/h)96.64 mph (155.53 km/h)
100 mph (160.93 km/h)101.73 mph (163.72 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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