Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/40r16 vs 195/40r16 Tire Comparison Side By Side
  205/40-16 195/40-16 Difference
Diameter inches (mm) 22.46 (570.4) 22.14 (562.4) -0.31 (-8) -1.4%
Width inches (mm) 8.07 (205) 7.68 (195) -0.39 (-10) -4.9%
Circum. inches (mm) 70.55 (1791.96) 69.56 (1766.83) -0.99 (-25.13) -1.4%
Sidewall Height inches (mm) 3.23 (82) 3.07 (78) -0.16 (-4) -4.9%
Revolutions per mile (km) 898.09 (558.05) 910.86 (565.98) 12.78 (7.94) 1.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.72 mph (31.74 km/h)
25 mph (40.23 km/h)24.65 mph (39.67 km/h)
30 mph (48.28 km/h)29.58 mph (47.6 km/h)
35 mph (56.33 km/h)34.51 mph (55.54 km/h)
40 mph (64.37 km/h)39.44 mph (63.47 km/h)
45 mph (72.42 km/h)44.37 mph (71.4 km/h)
50 mph (80.47 km/h)49.3 mph (79.34 km/h)
55 mph (88.51 km/h)54.23 mph (87.27 km/h)
60 mph (96.56 km/h)59.16 mph (95.21 km/h)
65 mph (104.61 km/h)64.09 mph (103.14 km/h)
70 mph (112.65 km/h)69.02 mph (111.07 km/h)
75 mph (120.7 km/h)73.95 mph (119.01 km/h)
80 mph (128.75 km/h)78.88 mph (126.94 km/h)
85 mph (136.79 km/h)83.81 mph (134.88 km/h)
90 mph (144.84 km/h)88.74 mph (142.81 km/h)
95 mph (152.89 km/h)93.67 mph (150.74 km/h)
100 mph (160.93 km/h)98.6 mph (158.68 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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