Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/35r19 vs 225/35r19 Tire Comparison Side By Side
  255/35-19 225/35-19 Difference
Diameter inches (mm) 26.03 (661.1) 25.2 (640.1) -0.83 (-21) -3.2%
Width inches (mm) 10.04 (255) 8.86 (225) -1.18 (-30) -11.8%
Circum. inches (mm) 81.77 (2076.91) 79.17 (2010.93) -2.6 (-65.97) -3.2%
Sidewall Height inches (mm) 3.51 (89.25) 3.1 (78.75) -0.41 (-10.5) -11.8%
Revolutions per mile (km) 774.88 (481.48) 800.3 (497.28) 25.42 (15.8) 3.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.36 mph (31.16 km/h)
25 mph (40.23 km/h)24.21 mph (38.96 km/h)
30 mph (48.28 km/h)29.05 mph (46.75 km/h)
35 mph (56.33 km/h)33.89 mph (54.54 km/h)
40 mph (64.37 km/h)38.73 mph (62.33 km/h)
45 mph (72.42 km/h)43.57 mph (70.12 km/h)
50 mph (80.47 km/h)48.41 mph (77.91 km/h)
55 mph (88.51 km/h)53.25 mph (85.7 km/h)
60 mph (96.56 km/h)58.09 mph (93.49 km/h)
65 mph (104.61 km/h)62.94 mph (101.28 km/h)
70 mph (112.65 km/h)67.78 mph (109.08 km/h)
75 mph (120.7 km/h)72.62 mph (116.87 km/h)
80 mph (128.75 km/h)77.46 mph (124.66 km/h)
85 mph (136.79 km/h)82.3 mph (132.45 km/h)
90 mph (144.84 km/h)87.14 mph (140.24 km/h)
95 mph (152.89 km/h)91.98 mph (148.03 km/h)
100 mph (160.93 km/h)96.82 mph (155.82 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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