Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/75r16 vs 205/85r16 Tire Comparison Side By Side
  195/75-16 205/85-16 Difference
Diameter inches (mm) 27.52 (698.9) 29.72 (754.9) 2.2 (56) 8%
Width inches (mm) 7.68 (195) 8.07 (205) 0.39 (10) 5.1%
Circum. inches (mm) 86.44 (2195.66) 93.37 (2371.59) 6.93 (175.93) 8%
Sidewall Height inches (mm) 5.76 (146.25) 6.86 (174.25) 1.1 (28) 19.1%
Revolutions per mile (km) 732.97 (455.44) 678.59 (421.66) -54.37 (-33.79) -7.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.6 mph (34.77 km/h)
25 mph (40.23 km/h)27 mph (43.46 km/h)
30 mph (48.28 km/h)32.4 mph (52.15 km/h)
35 mph (56.33 km/h)37.8 mph (60.84 km/h)
40 mph (64.37 km/h)43.21 mph (69.53 km/h)
45 mph (72.42 km/h)48.61 mph (78.22 km/h)
50 mph (80.47 km/h)54.01 mph (86.91 km/h)
55 mph (88.51 km/h)59.41 mph (95.61 km/h)
60 mph (96.56 km/h)64.81 mph (104.3 km/h)
65 mph (104.61 km/h)70.21 mph (112.99 km/h)
70 mph (112.65 km/h)75.61 mph (121.68 km/h)
75 mph (120.7 km/h)81.01 mph (130.37 km/h)
80 mph (128.75 km/h)86.41 mph (139.06 km/h)
85 mph (136.79 km/h)91.81 mph (147.76 km/h)
90 mph (144.84 km/h)97.21 mph (156.45 km/h)
95 mph (152.89 km/h)102.61 mph (165.14 km/h)
100 mph (160.93 km/h)108.01 mph (173.83 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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