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 205/45r16 Tire Comparison Side By Side
  205/40-17 205/45-16 Difference
Diameter inches (mm) 23.46 (595.8) 23.26 (590.9) -0.19 (-4.9) -0.8%
Width inches (mm) 8.07 (205) 8.07 (205) 0 (0) 0%
Circum. inches (mm) 73.69 (1871.76) 73.09 (1856.37) -0.61 (-15.39) -0.8%
Sidewall Height inches (mm) 3.23 (82) 3.63 (92.25) 0.4 (10.25) 12.5%
Revolutions per mile (km) 859.8 (534.26) 866.93 (538.69) 7.13 (4.43) 0.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.84 mph (31.92 km/h)
25 mph (40.23 km/h)24.79 mph (39.9 km/h)
30 mph (48.28 km/h)29.75 mph (47.88 km/h)
35 mph (56.33 km/h)34.71 mph (55.86 km/h)
40 mph (64.37 km/h)39.67 mph (63.84 km/h)
45 mph (72.42 km/h)44.63 mph (71.83 km/h)
50 mph (80.47 km/h)49.59 mph (79.81 km/h)
55 mph (88.51 km/h)54.55 mph (87.79 km/h)
60 mph (96.56 km/h)59.51 mph (95.77 km/h)
65 mph (104.61 km/h)64.47 mph (103.75 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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