Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/60r16 vs 225/60r16 Tire Comparison Side By Side
  275/60-16 225/60-16 Difference
Diameter inches (mm) 28.99 (736.4) 26.63 (676.4) -2.36 (-60) -8.1%
Width inches (mm) 10.83 (275) 8.86 (225) -1.97 (-50) -18.2%
Circum. inches (mm) 91.08 (2313.47) 83.66 (2124.97) -7.42 (-188.5) -8.1%
Sidewall Height inches (mm) 6.5 (165) 5.31 (135) -1.18 (-30) -18.2%
Revolutions per mile (km) 695.64 (432.25) 757.35 (470.59) 61.71 (38.34) 8.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.37 mph (29.56 km/h)
25 mph (40.23 km/h)22.96 mph (36.96 km/h)
30 mph (48.28 km/h)27.56 mph (44.35 km/h)
35 mph (56.33 km/h)32.15 mph (51.74 km/h)
40 mph (64.37 km/h)36.74 mph (59.13 km/h)
45 mph (72.42 km/h)41.33 mph (66.52 km/h)
50 mph (80.47 km/h)45.93 mph (73.91 km/h)
55 mph (88.51 km/h)50.52 mph (81.3 km/h)
60 mph (96.56 km/h)55.11 mph (88.69 km/h)
65 mph (104.61 km/h)59.7 mph (96.08 km/h)
70 mph (112.65 km/h)64.3 mph (103.48 km/h)
75 mph (120.7 km/h)68.89 mph (110.87 km/h)
80 mph (128.75 km/h)73.48 mph (118.26 km/h)
85 mph (136.79 km/h)78.07 mph (125.65 km/h)
90 mph (144.84 km/h)82.67 mph (133.04 km/h)
95 mph (152.89 km/h)87.26 mph (140.43 km/h)
100 mph (160.93 km/h)91.85 mph (147.82 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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