Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/65r13 vs 225/60r17 Tire Comparison Side By Side
  205/65-13 225/60-17 Difference
Diameter inches (mm) 23.49 (596.7) 27.63 (701.8) 4.14 (105.1) 17.6%
Width inches (mm) 8.07 (205) 8.86 (225) 0.79 (20) 9.8%
Circum. inches (mm) 73.8 (1874.59) 86.8 (2204.77) 13 (330.18) 17.6%
Sidewall Height inches (mm) 5.25 (133.25) 5.31 (135) 0.07 (1.75) 1.3%
Revolutions per mile (km) 858.51 (533.45) 729.94 (453.56) -128.57 (-79.89) -15%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23.52 mph (37.86 km/h)
25 mph (40.23 km/h)29.4 mph (47.32 km/h)
30 mph (48.28 km/h)35.28 mph (56.78 km/h)
35 mph (56.33 km/h)41.16 mph (66.25 km/h)
40 mph (64.37 km/h)47.05 mph (75.71 km/h)
45 mph (72.42 km/h)52.93 mph (85.18 km/h)
50 mph (80.47 km/h)58.81 mph (94.64 km/h)
55 mph (88.51 km/h)64.69 mph (104.1 km/h)
60 mph (96.56 km/h)70.57 mph (113.57 km/h)
65 mph (104.61 km/h)76.45 mph (123.03 km/h)
70 mph (112.65 km/h)82.33 mph (132.5 km/h)
75 mph (120.7 km/h)88.21 mph (141.96 km/h)
80 mph (128.75 km/h)94.09 mph (151.42 km/h)
85 mph (136.79 km/h)99.97 mph (160.89 km/h)
90 mph (144.84 km/h)105.85 mph (170.35 km/h)
95 mph (152.89 km/h)111.73 mph (179.82 km/h)
100 mph (160.93 km/h)117.61 mph (189.28 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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