Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/80r16 vs 205/70r16 Tire Comparison Side By Side
  195/80-16 205/70-16 Difference
Diameter inches (mm) 28.28 (718.4) 27.3 (693.4) -0.98 (-25) -3.5%
Width inches (mm) 7.68 (195) 8.07 (205) 0.39 (10) 5.1%
Circum. inches (mm) 88.86 (2256.92) 85.76 (2178.38) -3.09 (-78.54) -3.5%
Sidewall Height inches (mm) 6.14 (156) 5.65 (143.5) -0.49 (-12.5) -8%
Revolutions per mile (km) 713.07 (443.08) 738.78 (459.06) 25.71 (15.97) 3.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.3 mph (31.07 km/h)
25 mph (40.23 km/h)24.13 mph (38.83 km/h)
30 mph (48.28 km/h)28.96 mph (46.6 km/h)
35 mph (56.33 km/h)33.78 mph (54.37 km/h)
40 mph (64.37 km/h)38.61 mph (62.13 km/h)
45 mph (72.42 km/h)43.43 mph (69.9 km/h)
50 mph (80.47 km/h)48.26 mph (77.67 km/h)
55 mph (88.51 km/h)53.09 mph (85.43 km/h)
60 mph (96.56 km/h)57.91 mph (93.2 km/h)
65 mph (104.61 km/h)62.74 mph (100.97 km/h)
70 mph (112.65 km/h)67.56 mph (108.73 km/h)
75 mph (120.7 km/h)72.39 mph (116.5 km/h)
80 mph (128.75 km/h)77.22 mph (124.27 km/h)
85 mph (136.79 km/h)82.04 mph (132.03 km/h)
90 mph (144.84 km/h)86.87 mph (139.8 km/h)
95 mph (152.89 km/h)91.69 mph (147.57 km/h)
100 mph (160.93 km/h)96.52 mph (155.33 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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