Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/60r17 vs 185/55r17 Tire Comparison Side By Side
  195/60-17 185/55-17 Difference
Diameter inches (mm) 26.21 (665.8) 25.01 (635.3) -1.2 (-30.5) -4.6%
Width inches (mm) 7.68 (195) 7.28 (185) -0.39 (-10) -5.1%
Circum. inches (mm) 82.35 (2091.67) 78.58 (1995.85) -3.77 (-95.82) -4.6%
Sidewall Height inches (mm) 4.61 (117) 4.01 (101.75) -0.6 (-15.25) -13%
Revolutions per mile (km) 769.41 (478.09) 806.34 (501.04) 36.94 (22.95) 4.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.08 mph (30.71 km/h)
25 mph (40.23 km/h)23.85 mph (38.39 km/h)
30 mph (48.28 km/h)28.63 mph (46.07 km/h)
35 mph (56.33 km/h)33.4 mph (53.75 km/h)
40 mph (64.37 km/h)38.17 mph (61.42 km/h)
45 mph (72.42 km/h)42.94 mph (69.1 km/h)
50 mph (80.47 km/h)47.71 mph (76.78 km/h)
55 mph (88.51 km/h)52.48 mph (84.46 km/h)
60 mph (96.56 km/h)57.25 mph (92.14 km/h)
65 mph (104.61 km/h)62.02 mph (99.82 km/h)
70 mph (112.65 km/h)66.79 mph (107.49 km/h)
75 mph (120.7 km/h)71.56 mph (115.17 km/h)
80 mph (128.75 km/h)76.34 mph (122.85 km/h)
85 mph (136.79 km/h)81.11 mph (130.53 km/h)
90 mph (144.84 km/h)85.88 mph (138.21 km/h)
95 mph (152.89 km/h)90.65 mph (145.88 km/h)
100 mph (160.93 km/h)95.42 mph (153.56 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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