Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/60r16 vs 215/60r16 Tire Comparison Side By Side
  225/60-16 215/60-16 Difference
Diameter inches (mm) 26.63 (676.4) 26.16 (664.4) -0.47 (-12) -1.8%
Width inches (mm) 8.86 (225) 8.46 (215) -0.39 (-10) -4.4%
Circum. inches (mm) 83.66 (2124.97) 82.18 (2087.27) -1.48 (-37.7) -1.8%
Sidewall Height inches (mm) 5.31 (135) 5.08 (129) -0.24 (-6) -4.4%
Revolutions per mile (km) 757.35 (470.59) 771.03 (479.09) 13.68 (8.5) 1.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.65 mph (31.62 km/h)
25 mph (40.23 km/h)24.56 mph (39.52 km/h)
30 mph (48.28 km/h)29.47 mph (47.42 km/h)
35 mph (56.33 km/h)34.38 mph (55.33 km/h)
40 mph (64.37 km/h)39.29 mph (63.23 km/h)
45 mph (72.42 km/h)44.2 mph (71.14 km/h)
50 mph (80.47 km/h)49.11 mph (79.04 km/h)
55 mph (88.51 km/h)54.02 mph (86.94 km/h)
60 mph (96.56 km/h)58.94 mph (94.85 km/h)
65 mph (104.61 km/h)63.85 mph (102.75 km/h)
70 mph (112.65 km/h)68.76 mph (110.66 km/h)
75 mph (120.7 km/h)73.67 mph (118.56 km/h)
80 mph (128.75 km/h)78.58 mph (126.46 km/h)
85 mph (136.79 km/h)83.49 mph (134.37 km/h)
90 mph (144.84 km/h)88.4 mph (142.27 km/h)
95 mph (152.89 km/h)93.31 mph (150.18 km/h)
100 mph (160.93 km/h)98.23 mph (158.08 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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