Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/75r16 vs 285/75r16 Tire Comparison Side By Side
  225/75-16 285/75-16 Difference
Diameter inches (mm) 29.29 (743.9) 32.83 (833.9) 3.54 (90) 12.1%
Width inches (mm) 8.86 (225) 11.22 (285) 2.36 (60) 26.7%
Circum. inches (mm) 92.01 (2337.03) 103.14 (2619.77) 11.13 (282.74) 12.1%
Sidewall Height inches (mm) 6.64 (168.75) 8.42 (213.75) 1.77 (45) 26.7%
Revolutions per mile (km) 688.63 (427.89) 614.31 (381.71) -74.32 (-46.18) -10.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.42 mph (36.08 km/h)
25 mph (40.23 km/h)28.02 mph (45.1 km/h)
30 mph (48.28 km/h)33.63 mph (54.12 km/h)
35 mph (56.33 km/h)39.23 mph (63.14 km/h)
40 mph (64.37 km/h)44.84 mph (72.16 km/h)
45 mph (72.42 km/h)50.44 mph (81.18 km/h)
50 mph (80.47 km/h)56.05 mph (90.2 km/h)
55 mph (88.51 km/h)61.65 mph (99.22 km/h)
60 mph (96.56 km/h)67.26 mph (108.24 km/h)
65 mph (104.61 km/h)72.86 mph (117.26 km/h)
70 mph (112.65 km/h)78.47 mph (126.28 km/h)
75 mph (120.7 km/h)84.07 mph (135.3 km/h)
80 mph (128.75 km/h)89.68 mph (144.32 km/h)
85 mph (136.79 km/h)95.28 mph (153.34 km/h)
90 mph (144.84 km/h)100.89 mph (162.36 km/h)
95 mph (152.89 km/h)106.49 mph (171.38 km/h)
100 mph (160.93 km/h)112.1 mph (180.41 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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