Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/55r16 vs 225/60r16 Tire Comparison Side By Side
  215/55-16 225/60-16 Difference
Diameter inches (mm) 25.31 (642.9) 26.63 (676.4) 1.32 (33.5) 5.2%
Width inches (mm) 8.46 (215) 8.86 (225) 0.39 (10) 4.7%
Circum. inches (mm) 79.52 (2019.73) 83.66 (2124.97) 4.14 (105.24) 5.2%
Sidewall Height inches (mm) 4.66 (118.25) 5.31 (135) 0.66 (16.75) 14.2%
Revolutions per mile (km) 796.81 (495.11) 757.35 (470.59) -39.46 (-24.52) -5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.04 mph (33.86 km/h)
25 mph (40.23 km/h)26.3 mph (42.33 km/h)
30 mph (48.28 km/h)31.56 mph (50.8 km/h)
35 mph (56.33 km/h)36.82 mph (59.26 km/h)
40 mph (64.37 km/h)42.08 mph (67.73 km/h)
45 mph (72.42 km/h)47.34 mph (76.19 km/h)
50 mph (80.47 km/h)52.61 mph (84.66 km/h)
55 mph (88.51 km/h)57.87 mph (93.13 km/h)
60 mph (96.56 km/h)63.13 mph (101.59 km/h)
65 mph (104.61 km/h)68.39 mph (110.06 km/h)
70 mph (112.65 km/h)73.65 mph (118.52 km/h)
75 mph (120.7 km/h)78.91 mph (126.99 km/h)
80 mph (128.75 km/h)84.17 mph (135.46 km/h)
85 mph (136.79 km/h)89.43 mph (143.92 km/h)
90 mph (144.84 km/h)94.69 mph (152.39 km/h)
95 mph (152.89 km/h)99.95 mph (160.85 km/h)
100 mph (160.93 km/h)105.21 mph (169.32 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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