Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
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205/65r13 vs 265/35r17 Tire Comparison Side By Side
  205/65-13 265/35-17 Difference
Diameter inches (mm) 23.49 (596.7) 24.3 (617.3) 0.81 (20.6) 3.5%
Width inches (mm) 8.07 (205) 10.43 (265) 2.36 (60) 29.3%
Circum. inches (mm) 73.8 (1874.59) 76.35 (1939.31) 2.55 (64.72) 3.5%
Sidewall Height inches (mm) 5.25 (133.25) 3.65 (92.75) -1.59 (-40.5) -30.4%
Revolutions per mile (km) 858.51 (533.45) 829.86 (515.65) -28.65 (-17.8) -3.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.69 mph (33.3 km/h)
25 mph (40.23 km/h)25.86 mph (41.62 km/h)
30 mph (48.28 km/h)31.04 mph (49.95 km/h)
35 mph (56.33 km/h)36.21 mph (58.27 km/h)
40 mph (64.37 km/h)41.38 mph (66.6 km/h)
45 mph (72.42 km/h)46.55 mph (74.92 km/h)
50 mph (80.47 km/h)51.73 mph (83.25 km/h)
55 mph (88.51 km/h)56.9 mph (91.57 km/h)
60 mph (96.56 km/h)62.07 mph (99.89 km/h)
65 mph (104.61 km/h)67.24 mph (108.22 km/h)
70 mph (112.65 km/h)72.42 mph (116.54 km/h)
75 mph (120.7 km/h)77.59 mph (124.87 km/h)
80 mph (128.75 km/h)82.76 mph (133.19 km/h)
85 mph (136.79 km/h)87.93 mph (141.52 km/h)
90 mph (144.84 km/h)93.11 mph (149.84 km/h)
95 mph (152.89 km/h)98.28 mph (158.17 km/h)
100 mph (160.93 km/h)103.45 mph (166.49 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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