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 215/35r17 Tire Comparison Side By Side
  205/40-17 215/35-17 Difference
Diameter inches (mm) 23.46 (595.8) 22.93 (582.3) -0.53 (-13.5) -2.3%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 73.69 (1871.76) 72.02 (1829.35) -1.67 (-42.41) -2.3%
Sidewall Height inches (mm) 3.23 (82) 2.96 (75.25) -0.27 (-6.75) -8.2%
Revolutions per mile (km) 859.8 (534.26) 879.74 (546.64) 19.93 (12.39) 2.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.55 mph (31.46 km/h)
25 mph (40.23 km/h)24.43 mph (39.32 km/h)
30 mph (48.28 km/h)29.32 mph (47.19 km/h)
35 mph (56.33 km/h)34.21 mph (55.05 km/h)
40 mph (64.37 km/h)39.09 mph (62.92 km/h)
45 mph (72.42 km/h)43.98 mph (70.78 km/h)
50 mph (80.47 km/h)48.87 mph (78.64 km/h)
55 mph (88.51 km/h)53.75 mph (86.51 km/h)
60 mph (96.56 km/h)58.64 mph (94.37 km/h)
65 mph (104.61 km/h)63.53 mph (102.24 km/h)
70 mph (112.65 km/h)68.41 mph (110.1 km/h)
75 mph (120.7 km/h)73.3 mph (117.97 km/h)
80 mph (128.75 km/h)78.19 mph (125.83 km/h)
85 mph (136.79 km/h)83.07 mph (133.69 km/h)
90 mph (144.84 km/h)87.96 mph (141.56 km/h)
95 mph (152.89 km/h)92.85 mph (149.42 km/h)
100 mph (160.93 km/h)97.73 mph (157.29 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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