Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/60r14 vs 185/60r14 Tire Comparison Side By Side
  205/60-14 185/60-14 Difference
Diameter inches (mm) 23.69 (601.6) 22.74 (577.6) -0.94 (-24) -4%
Width inches (mm) 8.07 (205) 7.28 (185) -0.79 (-20) -9.8%
Circum. inches (mm) 74.41 (1889.98) 71.44 (1814.58) -2.97 (-75.4) -4%
Sidewall Height inches (mm) 4.84 (123) 4.37 (111) -0.47 (-12) -9.8%
Revolutions per mile (km) 851.51 (529.1) 886.89 (551.09) 35.38 (21.98) 4.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.2 mph (30.9 km/h)
25 mph (40.23 km/h)24 mph (38.63 km/h)
30 mph (48.28 km/h)28.8 mph (46.35 km/h)
35 mph (56.33 km/h)33.6 mph (54.08 km/h)
40 mph (64.37 km/h)38.4 mph (61.81 km/h)
45 mph (72.42 km/h)43.2 mph (69.53 km/h)
50 mph (80.47 km/h)48.01 mph (77.26 km/h)
55 mph (88.51 km/h)52.81 mph (84.98 km/h)
60 mph (96.56 km/h)57.61 mph (92.71 km/h)
65 mph (104.61 km/h)62.41 mph (100.43 km/h)
70 mph (112.65 km/h)67.21 mph (108.16 km/h)
75 mph (120.7 km/h)72.01 mph (115.89 km/h)
80 mph (128.75 km/h)76.81 mph (123.61 km/h)
85 mph (136.79 km/h)81.61 mph (131.34 km/h)
90 mph (144.84 km/h)86.41 mph (139.06 km/h)
95 mph (152.89 km/h)91.21 mph (146.79 km/h)
100 mph (160.93 km/h)96.01 mph (154.51 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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