Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/65r17 vs 205/55r17 Tire Comparison Side By Side
  205/65-17 205/55-17 Difference
Diameter inches (mm) 27.49 (698.3) 25.88 (657.3) -1.61 (-41) -5.9%
Width inches (mm) 8.07 (205) 8.07 (205) 0 (0) 0%
Circum. inches (mm) 86.37 (2193.77) 81.3 (2064.97) -5.07 (-128.81) -5.9%
Sidewall Height inches (mm) 5.25 (133.25) 4.44 (112.75) -0.81 (-20.5) -15.4%
Revolutions per mile (km) 733.6 (455.83) 779.36 (484.27) 45.76 (28.43) 6.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.83 mph (30.3 km/h)
25 mph (40.23 km/h)23.53 mph (37.87 km/h)
30 mph (48.28 km/h)28.24 mph (45.45 km/h)
35 mph (56.33 km/h)32.95 mph (53.02 km/h)
40 mph (64.37 km/h)37.65 mph (60.59 km/h)
45 mph (72.42 km/h)42.36 mph (68.17 km/h)
50 mph (80.47 km/h)47.06 mph (75.74 km/h)
55 mph (88.51 km/h)51.77 mph (83.32 km/h)
60 mph (96.56 km/h)56.48 mph (90.89 km/h)
65 mph (104.61 km/h)61.18 mph (98.47 km/h)
70 mph (112.65 km/h)65.89 mph (106.04 km/h)
75 mph (120.7 km/h)70.6 mph (113.61 km/h)
80 mph (128.75 km/h)75.3 mph (121.19 km/h)
85 mph (136.79 km/h)80.01 mph (128.76 km/h)
90 mph (144.84 km/h)84.72 mph (136.34 km/h)
95 mph (152.89 km/h)89.42 mph (143.91 km/h)
100 mph (160.93 km/h)94.13 mph (151.49 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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