Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
285/65r16 vs 33/10.5r16 Tire Comparison Side By Side
  285/65-16 33/10.5-16 Difference
Diameter inches (mm) 30.59 (776.9) 33.03 (838.94) 2.44 (62.04) 8%
Width inches (mm) 11.22 (285) 10.51 (267) -0.71 (-18) -6.3%
Circum. inches (mm) 96.09 (2440.7) 103.76 (2635.61) 7.67 (194.9) 8%
Sidewall Height inches (mm) 7.29 (185.25) 8.51 (216.27) 1.22 (31.02) 16.7%
Revolutions per mile (km) 659.38 (409.72) 610.62 (379.42) -48.76 (-30.3) -7.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.6 mph (34.76 km/h)
25 mph (40.23 km/h)27 mph (43.45 km/h)
30 mph (48.28 km/h)32.4 mph (52.14 km/h)
35 mph (56.33 km/h)37.79 mph (60.83 km/h)
40 mph (64.37 km/h)43.19 mph (69.51 km/h)
45 mph (72.42 km/h)48.59 mph (78.2 km/h)
50 mph (80.47 km/h)53.99 mph (86.89 km/h)
55 mph (88.51 km/h)59.39 mph (95.58 km/h)
60 mph (96.56 km/h)64.79 mph (104.27 km/h)
65 mph (104.61 km/h)70.19 mph (112.96 km/h)
70 mph (112.65 km/h)75.59 mph (121.65 km/h)
75 mph (120.7 km/h)80.99 mph (130.34 km/h)
80 mph (128.75 km/h)86.39 mph (139.03 km/h)
85 mph (136.79 km/h)91.79 mph (147.72 km/h)
90 mph (144.84 km/h)97.19 mph (156.41 km/h)
95 mph (152.89 km/h)102.59 mph (165.1 km/h)
100 mph (160.93 km/h)107.99 mph (173.79 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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