Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
35/12r16 vs 285/75r16 Tire Comparison Side By Side
  35/12-16 285/75-16 Difference
Diameter inches (mm) 34.97 (888.3) 32.83 (833.9) -2.14 (-54.4) -6.1%
Width inches (mm) 12.01 (305) 11.22 (285) -0.79 (-20) -6.6%
Circum. inches (mm) 109.87 (2790.68) 103.14 (2619.77) -6.73 (-170.9) -6.1%
Sidewall Height inches (mm) 9.49 (240.95) 8.42 (213.75) -1.07 (-27.2) -11.3%
Revolutions per mile (km) 576.69 (358.34) 614.31 (381.71) 37.62 (23.38) 6.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.78 mph (30.22 km/h)
25 mph (40.23 km/h)23.47 mph (37.77 km/h)
30 mph (48.28 km/h)28.16 mph (45.32 km/h)
35 mph (56.33 km/h)32.86 mph (52.88 km/h)
40 mph (64.37 km/h)37.55 mph (60.43 km/h)
45 mph (72.42 km/h)42.24 mph (67.99 km/h)
50 mph (80.47 km/h)46.94 mph (75.54 km/h)
55 mph (88.51 km/h)51.63 mph (83.09 km/h)
60 mph (96.56 km/h)56.33 mph (90.65 km/h)
65 mph (104.61 km/h)61.02 mph (98.2 km/h)
70 mph (112.65 km/h)65.71 mph (105.76 km/h)
75 mph (120.7 km/h)70.41 mph (113.31 km/h)
80 mph (128.75 km/h)75.1 mph (120.86 km/h)
85 mph (136.79 km/h)79.79 mph (128.42 km/h)
90 mph (144.84 km/h)84.49 mph (135.97 km/h)
95 mph (152.89 km/h)89.18 mph (143.53 km/h)
100 mph (160.93 km/h)93.88 mph (151.08 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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