Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/70r19 vs 225/70r19.5 Tire Comparison Side By Side
  265/70-19 225/70-19.5 Difference
Diameter inches (mm) 33.61 (853.6) 31.9 (810.3) -1.7 (-43.3) -5.1%
Width inches (mm) 10.43 (265) 8.86 (225) -1.57 (-40) -15.1%
Circum. inches (mm) 105.58 (2681.66) 100.22 (2545.63) -5.36 (-136.03) -5.1%
Sidewall Height inches (mm) 7.3 (185.5) 6.2 (157.5) -1.1 (-28) -15.1%
Revolutions per mile (km) 600.13 (372.9) 632.2 (392.83) 32.07 (19.93) 5.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.99 mph (30.55 km/h)
25 mph (40.23 km/h)23.73 mph (38.19 km/h)
30 mph (48.28 km/h)28.48 mph (45.83 km/h)
35 mph (56.33 km/h)33.22 mph (53.47 km/h)
40 mph (64.37 km/h)37.97 mph (61.11 km/h)
45 mph (72.42 km/h)42.72 mph (68.75 km/h)
50 mph (80.47 km/h)47.46 mph (76.39 km/h)
55 mph (88.51 km/h)52.21 mph (84.02 km/h)
60 mph (96.56 km/h)56.96 mph (91.66 km/h)
65 mph (104.61 km/h)61.7 mph (99.3 km/h)
70 mph (112.65 km/h)66.45 mph (106.94 km/h)
75 mph (120.7 km/h)71.2 mph (114.58 km/h)
80 mph (128.75 km/h)75.94 mph (122.22 km/h)
85 mph (136.79 km/h)80.69 mph (129.86 km/h)
90 mph (144.84 km/h)85.43 mph (137.49 km/h)
95 mph (152.89 km/h)90.18 mph (145.13 km/h)
100 mph (160.93 km/h)94.93 mph (152.77 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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