Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/45r19 vs 235/45r19 Tire Comparison Side By Side
  225/45-19 235/45-19 Difference
Diameter inches (mm) 26.97 (685.1) 27.33 (694.1) 0.35 (9) 1.3%
Width inches (mm) 8.86 (225) 9.25 (235) 0.39 (10) 4.4%
Circum. inches (mm) 84.74 (2152.31) 85.85 (2180.58) 1.11 (28.27) 1.3%
Sidewall Height inches (mm) 3.99 (101.25) 4.16 (105.75) 0.18 (4.5) 4.4%
Revolutions per mile (km) 747.73 (464.62) 738.04 (458.59) -9.7 (-6.02) -1.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.26 mph (32.61 km/h)
25 mph (40.23 km/h)25.33 mph (40.76 km/h)
30 mph (48.28 km/h)30.39 mph (48.91 km/h)
35 mph (56.33 km/h)35.46 mph (57.07 km/h)
40 mph (64.37 km/h)40.53 mph (65.22 km/h)
45 mph (72.42 km/h)45.59 mph (73.37 km/h)
50 mph (80.47 km/h)50.66 mph (81.52 km/h)
55 mph (88.51 km/h)55.72 mph (89.68 km/h)
60 mph (96.56 km/h)60.79 mph (97.83 km/h)
65 mph (104.61 km/h)65.85 mph (105.98 km/h)
70 mph (112.65 km/h)70.92 mph (114.13 km/h)
75 mph (120.7 km/h)75.99 mph (122.29 km/h)
80 mph (128.75 km/h)81.05 mph (130.44 km/h)
85 mph (136.79 km/h)86.12 mph (138.59 km/h)
90 mph (144.84 km/h)91.18 mph (146.74 km/h)
95 mph (152.89 km/h)96.25 mph (154.9 km/h)
100 mph (160.93 km/h)101.31 mph (163.05 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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