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 34/10.5r17 Tire Comparison Side By Side
  285/75-16 34/10.5-17 Difference
Diameter inches (mm) 32.83 (833.9) 34.03 (864.34) 1.2 (30.44) 3.7%
Width inches (mm) 11.22 (285) 10.51 (267) -0.71 (-18) -6.3%
Circum. inches (mm) 103.14 (2619.77) 106.91 (2715.4) 3.76 (95.63) 3.7%
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) 592.67 (368.27) -21.63 (-13.44) -3.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.73 mph (33.36 km/h)
25 mph (40.23 km/h)25.91 mph (41.7 km/h)
30 mph (48.28 km/h)31.1 mph (50.04 km/h)
35 mph (56.33 km/h)36.28 mph (58.38 km/h)
40 mph (64.37 km/h)41.46 mph (66.72 km/h)
45 mph (72.42 km/h)46.64 mph (75.06 km/h)
50 mph (80.47 km/h)51.83 mph (83.4 km/h)
55 mph (88.51 km/h)57.01 mph (91.75 km/h)
60 mph (96.56 km/h)62.19 mph (100.09 km/h)
65 mph (104.61 km/h)67.37 mph (108.43 km/h)
70 mph (112.65 km/h)72.56 mph (116.77 km/h)
75 mph (120.7 km/h)77.74 mph (125.11 km/h)
80 mph (128.75 km/h)82.92 mph (133.45 km/h)
85 mph (136.79 km/h)88.1 mph (141.79 km/h)
90 mph (144.84 km/h)93.29 mph (150.13 km/h)
95 mph (152.89 km/h)98.47 mph (158.47 km/h)
100 mph (160.93 km/h)103.65 mph (166.81 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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