Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/55r19 vs 235/55r19 Tire Comparison Side By Side
  225/55-19 235/55-19 Difference
Diameter inches (mm) 28.74 (730.1) 29.18 (741.1) 0.43 (11) 1.5%
Width inches (mm) 8.86 (225) 9.25 (235) 0.39 (10) 4.4%
Circum. inches (mm) 90.3 (2293.68) 91.66 (2328.23) 1.36 (34.56) 1.5%
Sidewall Height inches (mm) 4.87 (123.75) 5.09 (129.25) 0.22 (5.5) 4.4%
Revolutions per mile (km) 701.64 (435.98) 691.23 (429.51) -10.41 (-6.47) -1.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.3 mph (32.67 km/h)
25 mph (40.23 km/h)25.38 mph (40.84 km/h)
30 mph (48.28 km/h)30.45 mph (49.01 km/h)
35 mph (56.33 km/h)35.53 mph (57.18 km/h)
40 mph (64.37 km/h)40.6 mph (65.34 km/h)
45 mph (72.42 km/h)45.68 mph (73.51 km/h)
50 mph (80.47 km/h)50.75 mph (81.68 km/h)
55 mph (88.51 km/h)55.83 mph (89.85 km/h)
60 mph (96.56 km/h)60.9 mph (98.02 km/h)
65 mph (104.61 km/h)65.98 mph (106.18 km/h)
70 mph (112.65 km/h)71.05 mph (114.35 km/h)
75 mph (120.7 km/h)76.13 mph (122.52 km/h)
80 mph (128.75 km/h)81.21 mph (130.69 km/h)
85 mph (136.79 km/h)86.28 mph (138.86 km/h)
90 mph (144.84 km/h)91.36 mph (147.02 km/h)
95 mph (152.89 km/h)96.43 mph (155.19 km/h)
100 mph (160.93 km/h)101.51 mph (163.36 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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