Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/60r16 vs 225/60r17 Tire Comparison Side By Side
  205/60-16 225/60-17 Difference
Diameter inches (mm) 25.69 (652.4) 27.63 (701.8) 1.94 (49.4) 7.6%
Width inches (mm) 8.07 (205) 8.86 (225) 0.79 (20) 9.8%
Circum. inches (mm) 80.69 (2049.58) 86.8 (2204.77) 6.11 (155.19) 7.6%
Sidewall Height inches (mm) 4.84 (123) 5.31 (135) 0.47 (12) 9.8%
Revolutions per mile (km) 785.21 (487.91) 729.94 (453.56) -55.27 (-34.34) -7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.51 mph (34.62 km/h)
25 mph (40.23 km/h)26.89 mph (43.28 km/h)
30 mph (48.28 km/h)32.27 mph (51.94 km/h)
35 mph (56.33 km/h)37.65 mph (60.59 km/h)
40 mph (64.37 km/h)43.03 mph (69.25 km/h)
45 mph (72.42 km/h)48.41 mph (77.9 km/h)
50 mph (80.47 km/h)53.79 mph (86.56 km/h)
55 mph (88.51 km/h)59.16 mph (95.22 km/h)
60 mph (96.56 km/h)64.54 mph (103.87 km/h)
65 mph (104.61 km/h)69.92 mph (112.53 km/h)
70 mph (112.65 km/h)75.3 mph (121.18 km/h)
75 mph (120.7 km/h)80.68 mph (129.84 km/h)
80 mph (128.75 km/h)86.06 mph (138.5 km/h)
85 mph (136.79 km/h)91.44 mph (147.15 km/h)
90 mph (144.84 km/h)96.81 mph (155.81 km/h)
95 mph (152.89 km/h)102.19 mph (164.46 km/h)
100 mph (160.93 km/h)107.57 mph (173.12 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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