Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/80r17 vs 205/60r16 Tire Comparison Side By Side
  205/80-17 205/60-16 Difference
Diameter inches (mm) 29.91 (759.8) 25.69 (652.4) -4.23 (-107.4) -14.1%
Width inches (mm) 8.07 (205) 8.07 (205) 0 (0) 0%
Circum. inches (mm) 93.98 (2386.98) 80.69 (2049.58) -13.28 (-337.41) -14.1%
Sidewall Height inches (mm) 6.46 (164) 4.84 (123) -1.61 (-41) -25%
Revolutions per mile (km) 674.22 (418.94) 785.21 (487.91) 110.99 (68.97) 16.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.17 mph (27.64 km/h)
25 mph (40.23 km/h)21.47 mph (34.55 km/h)
30 mph (48.28 km/h)25.76 mph (41.46 km/h)
35 mph (56.33 km/h)30.05 mph (48.37 km/h)
40 mph (64.37 km/h)34.35 mph (55.27 km/h)
45 mph (72.42 km/h)38.64 mph (62.18 km/h)
50 mph (80.47 km/h)42.93 mph (69.09 km/h)
55 mph (88.51 km/h)47.23 mph (76 km/h)
60 mph (96.56 km/h)51.52 mph (82.91 km/h)
65 mph (104.61 km/h)55.81 mph (89.82 km/h)
70 mph (112.65 km/h)60.11 mph (96.73 km/h)
75 mph (120.7 km/h)64.4 mph (103.64 km/h)
80 mph (128.75 km/h)68.69 mph (110.55 km/h)
85 mph (136.79 km/h)72.98 mph (117.46 km/h)
90 mph (144.84 km/h)77.28 mph (124.37 km/h)
95 mph (152.89 km/h)81.57 mph (131.28 km/h)
100 mph (160.93 km/h)85.86 mph (138.19 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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