Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
285/75r16 vs 33/10.5r16 Tire Comparison Side By Side
  285/75-16 33/10.5-16 Difference
Diameter inches (mm) 32.83 (833.9) 33.03 (838.94) 0.2 (5.04) 0.6%
Width inches (mm) 11.22 (285) 10.51 (267) -0.71 (-18) -6.3%
Circum. inches (mm) 103.14 (2619.77) 103.76 (2635.61) 0.62 (15.83) 0.6%
Sidewall Height inches (mm) 8.42 (213.75) 8.51 (216.27) 0.1 (2.52) 1.2%
Revolutions per mile (km) 614.31 (381.71) 610.62 (379.42) -3.69 (-2.29) -0.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.12 mph (32.38 km/h)
25 mph (40.23 km/h)25.15 mph (40.48 km/h)
30 mph (48.28 km/h)30.18 mph (48.57 km/h)
35 mph (56.33 km/h)35.21 mph (56.67 km/h)
40 mph (64.37 km/h)40.24 mph (64.76 km/h)
45 mph (72.42 km/h)45.27 mph (72.86 km/h)
50 mph (80.47 km/h)50.3 mph (80.95 km/h)
55 mph (88.51 km/h)55.33 mph (89.05 km/h)
60 mph (96.56 km/h)60.36 mph (97.14 km/h)
65 mph (104.61 km/h)65.39 mph (105.24 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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