Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
285/60r17 vs 285/75r17 Tire Comparison Side By Side
  285/60-17 285/75-17 Difference
Diameter inches (mm) 30.46 (773.8) 33.83 (859.3) 3.37 (85.5) 11%
Width inches (mm) 11.22 (285) 11.22 (285) 0 (0) 0%
Circum. inches (mm) 95.71 (2430.96) 106.28 (2699.57) 10.58 (268.61) 11%
Sidewall Height inches (mm) 6.73 (171) 8.42 (213.75) 1.68 (42.75) 25%
Revolutions per mile (km) 662.02 (411.36) 596.15 (370.43) -65.87 (-40.93) -9.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.21 mph (35.74 km/h)
25 mph (40.23 km/h)27.76 mph (44.68 km/h)
30 mph (48.28 km/h)33.31 mph (53.62 km/h)
35 mph (56.33 km/h)38.87 mph (62.55 km/h)
40 mph (64.37 km/h)44.42 mph (71.49 km/h)
45 mph (72.42 km/h)49.97 mph (80.42 km/h)
50 mph (80.47 km/h)55.52 mph (89.36 km/h)
55 mph (88.51 km/h)61.08 mph (98.29 km/h)
60 mph (96.56 km/h)66.63 mph (107.23 km/h)
65 mph (104.61 km/h)72.18 mph (116.17 km/h)
70 mph (112.65 km/h)77.73 mph (125.1 km/h)
75 mph (120.7 km/h)83.29 mph (134.04 km/h)
80 mph (128.75 km/h)88.84 mph (142.97 km/h)
85 mph (136.79 km/h)94.39 mph (151.91 km/h)
90 mph (144.84 km/h)99.94 mph (160.85 km/h)
95 mph (152.89 km/h)105.5 mph (169.78 km/h)
100 mph (160.93 km/h)111.05 mph (178.72 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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