Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/45r16 vs 205/40r17 Tire Comparison Side By Side
  195/45-16 205/40-17 Difference
Diameter inches (mm) 22.91 (581.9) 23.46 (595.8) 0.55 (13.9) 2.4%
Width inches (mm) 7.68 (195) 8.07 (205) 0.39 (10) 5.1%
Circum. inches (mm) 71.97 (1828.09) 73.69 (1871.76) 1.72 (43.67) 2.4%
Sidewall Height inches (mm) 3.45 (87.75) 3.23 (82) -0.23 (-5.75) -6.6%
Revolutions per mile (km) 880.34 (547.02) 859.8 (534.26) -20.54 (-12.76) -2.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.48 mph (32.96 km/h)
25 mph (40.23 km/h)25.6 mph (41.19 km/h)
30 mph (48.28 km/h)30.72 mph (49.43 km/h)
35 mph (56.33 km/h)35.84 mph (57.67 km/h)
40 mph (64.37 km/h)40.96 mph (65.91 km/h)
45 mph (72.42 km/h)46.07 mph (74.15 km/h)
50 mph (80.47 km/h)51.19 mph (82.39 km/h)
55 mph (88.51 km/h)56.31 mph (90.63 km/h)
60 mph (96.56 km/h)61.43 mph (98.87 km/h)
65 mph (104.61 km/h)66.55 mph (107.11 km/h)
70 mph (112.65 km/h)71.67 mph (115.35 km/h)
75 mph (120.7 km/h)76.79 mph (123.58 km/h)
80 mph (128.75 km/h)81.91 mph (131.82 km/h)
85 mph (136.79 km/h)87.03 mph (140.06 km/h)
90 mph (144.84 km/h)92.15 mph (148.3 km/h)
95 mph (152.89 km/h)97.27 mph (156.54 km/h)
100 mph (160.93 km/h)102.39 mph (164.78 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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