Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/65r17 vs 225/60r17 Tire Comparison Side By Side
  265/65-17 225/60-17 Difference
Diameter inches (mm) 30.56 (776.3) 27.63 (701.8) -2.93 (-74.5) -9.6%
Width inches (mm) 10.43 (265) 8.86 (225) -1.57 (-40) -15.1%
Circum. inches (mm) 96.02 (2438.82) 86.8 (2204.77) -9.21 (-234.05) -9.6%
Sidewall Height inches (mm) 6.78 (172.25) 5.31 (135) -1.47 (-37.25) -21.6%
Revolutions per mile (km) 659.89 (410.03) 729.94 (453.56) 70.05 (43.53) 10.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.08 mph (29.1 km/h)
25 mph (40.23 km/h)22.6 mph (36.37 km/h)
30 mph (48.28 km/h)27.12 mph (43.65 km/h)
35 mph (56.33 km/h)31.64 mph (50.92 km/h)
40 mph (64.37 km/h)36.16 mph (58.2 km/h)
45 mph (72.42 km/h)40.68 mph (65.47 km/h)
50 mph (80.47 km/h)45.2 mph (72.75 km/h)
55 mph (88.51 km/h)49.72 mph (80.02 km/h)
60 mph (96.56 km/h)54.24 mph (87.29 km/h)
65 mph (104.61 km/h)58.76 mph (94.57 km/h)
70 mph (112.65 km/h)63.28 mph (101.84 km/h)
75 mph (120.7 km/h)67.8 mph (109.12 km/h)
80 mph (128.75 km/h)72.32 mph (116.39 km/h)
85 mph (136.79 km/h)76.84 mph (123.67 km/h)
90 mph (144.84 km/h)81.36 mph (130.94 km/h)
95 mph (152.89 km/h)85.88 mph (138.22 km/h)
100 mph (160.93 km/h)90.4 mph (145.49 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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