Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/40r17 vs 195/65r14 Tire Comparison Side By Side
  205/40-17 195/65-14 Difference
Diameter inches (mm) 23.46 (595.8) 23.98 (609.1) 0.52 (13.3) 2.2%
Width inches (mm) 8.07 (205) 7.68 (195) -0.39 (-10) -4.9%
Circum. inches (mm) 73.69 (1871.76) 75.34 (1913.54) 1.65 (41.78) 2.2%
Sidewall Height inches (mm) 3.23 (82) 4.99 (126.75) 1.76 (44.75) 54.6%
Revolutions per mile (km) 859.8 (534.26) 841.03 (522.59) -18.77 (-11.67) -2.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.45 mph (32.91 km/h)
25 mph (40.23 km/h)25.56 mph (41.13 km/h)
30 mph (48.28 km/h)30.67 mph (49.36 km/h)
35 mph (56.33 km/h)35.78 mph (57.58 km/h)
40 mph (64.37 km/h)40.89 mph (65.81 km/h)
45 mph (72.42 km/h)46 mph (74.04 km/h)
50 mph (80.47 km/h)51.12 mph (82.26 km/h)
55 mph (88.51 km/h)56.23 mph (90.49 km/h)
60 mph (96.56 km/h)61.34 mph (98.72 km/h)
65 mph (104.61 km/h)66.45 mph (106.94 km/h)
70 mph (112.65 km/h)71.56 mph (115.17 km/h)
75 mph (120.7 km/h)76.67 mph (123.4 km/h)
80 mph (128.75 km/h)81.79 mph (131.62 km/h)
85 mph (136.79 km/h)86.9 mph (139.85 km/h)
90 mph (144.84 km/h)92.01 mph (148.07 km/h)
95 mph (152.89 km/h)97.12 mph (156.3 km/h)
100 mph (160.93 km/h)102.23 mph (164.53 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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