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 215/40r17 Tire Comparison Side By Side
  205/40-17 215/40-17 Difference
Diameter inches (mm) 23.46 (595.8) 23.77 (603.8) 0.31 (8) 1.3%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 73.69 (1871.76) 74.68 (1896.89) 0.99 (25.13) 1.3%
Sidewall Height inches (mm) 3.23 (82) 3.39 (86) 0.16 (4) 4.9%
Revolutions per mile (km) 859.8 (534.26) 848.41 (527.18) -11.39 (-7.08) -1.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.27 mph (32.62 km/h)
25 mph (40.23 km/h)25.34 mph (40.77 km/h)
30 mph (48.28 km/h)30.4 mph (48.93 km/h)
35 mph (56.33 km/h)35.47 mph (57.08 km/h)
40 mph (64.37 km/h)40.54 mph (65.24 km/h)
45 mph (72.42 km/h)45.6 mph (73.39 km/h)
50 mph (80.47 km/h)50.67 mph (81.55 km/h)
55 mph (88.51 km/h)55.74 mph (89.7 km/h)
60 mph (96.56 km/h)60.81 mph (97.86 km/h)
65 mph (104.61 km/h)65.87 mph (106.01 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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