Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
285/35r19 vs 255/35r19 Tire Comparison Side By Side
  285/35-19 255/35-19 Difference
Diameter inches (mm) 26.85 (682.1) 26.03 (661.1) -0.83 (-21) -3.1%
Width inches (mm) 11.22 (285) 10.04 (255) -1.18 (-30) -10.5%
Circum. inches (mm) 84.37 (2142.88) 81.77 (2076.91) -2.6 (-65.97) -3.1%
Sidewall Height inches (mm) 3.93 (99.75) 3.51 (89.25) -0.41 (-10.5) -10.5%
Revolutions per mile (km) 751.02 (466.66) 774.88 (481.48) 23.86 (14.82) 3.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.38 mph (31.2 km/h)
25 mph (40.23 km/h)24.23 mph (38.99 km/h)
30 mph (48.28 km/h)29.08 mph (46.79 km/h)
35 mph (56.33 km/h)33.92 mph (54.59 km/h)
40 mph (64.37 km/h)38.77 mph (62.39 km/h)
45 mph (72.42 km/h)43.61 mph (70.19 km/h)
50 mph (80.47 km/h)48.46 mph (77.99 km/h)
55 mph (88.51 km/h)53.31 mph (85.79 km/h)
60 mph (96.56 km/h)58.15 mph (93.59 km/h)
65 mph (104.61 km/h)63 mph (101.39 km/h)
70 mph (112.65 km/h)67.84 mph (109.19 km/h)
75 mph (120.7 km/h)72.69 mph (116.98 km/h)
80 mph (128.75 km/h)77.54 mph (124.78 km/h)
85 mph (136.79 km/h)82.38 mph (132.58 km/h)
90 mph (144.84 km/h)87.23 mph (140.38 km/h)
95 mph (152.89 km/h)92.08 mph (148.18 km/h)
100 mph (160.93 km/h)96.92 mph (155.98 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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