Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/80r16 vs 195/85r16 Tire Comparison Side By Side
  205/80-16 195/85-16 Difference
Diameter inches (mm) 28.91 (734.4) 29.05 (737.9) 0.14 (3.5) 0.5%
Width inches (mm) 8.07 (205) 7.68 (195) -0.39 (-10) -4.9%
Circum. inches (mm) 90.83 (2307.19) 91.27 (2318.18) 0.43 (11) 0.5%
Sidewall Height inches (mm) 6.46 (164) 6.53 (165.75) 0.07 (1.75) 1.1%
Revolutions per mile (km) 697.54 (433.43) 694.23 (431.37) -3.31 (-2.06) -0.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.1 mph (32.34 km/h)
25 mph (40.23 km/h)25.12 mph (40.43 km/h)
30 mph (48.28 km/h)30.14 mph (48.51 km/h)
35 mph (56.33 km/h)35.17 mph (56.6 km/h)
40 mph (64.37 km/h)40.19 mph (64.68 km/h)
45 mph (72.42 km/h)45.21 mph (72.77 km/h)
50 mph (80.47 km/h)50.24 mph (80.85 km/h)
55 mph (88.51 km/h)55.26 mph (88.94 km/h)
60 mph (96.56 km/h)60.29 mph (97.02 km/h)
65 mph (104.61 km/h)65.31 mph (105.11 km/h)
70 mph (112.65 km/h)70.33 mph (113.19 km/h)
75 mph (120.7 km/h)75.36 mph (121.28 km/h)
80 mph (128.75 km/h)80.38 mph (129.36 km/h)
85 mph (136.79 km/h)85.41 mph (137.45 km/h)
90 mph (144.84 km/h)90.43 mph (145.53 km/h)
95 mph (152.89 km/h)95.45 mph (153.62 km/h)
100 mph (160.93 km/h)100.48 mph (161.7 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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