Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/50r19 vs 205/70r14 Tire Comparison Side By Side
  255/50-19 205/70-14 Difference
Diameter inches (mm) 29.04 (737.6) 25.3 (642.6) -3.74 (-95) -12.9%
Width inches (mm) 10.04 (255) 8.07 (205) -1.97 (-50) -19.6%
Circum. inches (mm) 91.23 (2317.24) 79.48 (2018.79) -11.75 (-298.45) -12.9%
Sidewall Height inches (mm) 5.02 (127.5) 5.65 (143.5) 0.63 (16) 12.5%
Revolutions per mile (km) 694.51 (431.55) 797.18 (495.35) 102.67 (63.8) 14.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.42 mph (28.04 km/h)
25 mph (40.23 km/h)21.78 mph (35.05 km/h)
30 mph (48.28 km/h)26.14 mph (42.06 km/h)
35 mph (56.33 km/h)30.49 mph (49.07 km/h)
40 mph (64.37 km/h)34.85 mph (56.08 km/h)
45 mph (72.42 km/h)39.2 mph (63.09 km/h)
50 mph (80.47 km/h)43.56 mph (70.1 km/h)
55 mph (88.51 km/h)47.92 mph (77.11 km/h)
60 mph (96.56 km/h)52.27 mph (84.12 km/h)
65 mph (104.61 km/h)56.63 mph (91.13 km/h)
70 mph (112.65 km/h)60.98 mph (98.14 km/h)
75 mph (120.7 km/h)65.34 mph (105.16 km/h)
80 mph (128.75 km/h)69.7 mph (112.17 km/h)
85 mph (136.79 km/h)74.05 mph (119.18 km/h)
90 mph (144.84 km/h)78.41 mph (126.19 km/h)
95 mph (152.89 km/h)82.76 mph (133.2 km/h)
100 mph (160.93 km/h)87.12 mph (140.21 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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