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 235/35r19 Tire Comparison Side By Side
  225/45-19 235/35-19 Difference
Diameter inches (mm) 26.97 (685.1) 25.48 (647.1) -1.5 (-38) -5.5%
Width inches (mm) 8.86 (225) 9.25 (235) 0.39 (10) 4.4%
Circum. inches (mm) 84.74 (2152.31) 80.04 (2032.92) -4.7 (-119.38) -5.5%
Sidewall Height inches (mm) 3.99 (101.25) 3.24 (82.25) -0.75 (-19) -18.8%
Revolutions per mile (km) 747.73 (464.62) 791.64 (491.9) 43.91 (27.28) 5.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.89 mph (30.4 km/h)
25 mph (40.23 km/h)23.61 mph (38 km/h)
30 mph (48.28 km/h)28.34 mph (45.6 km/h)
35 mph (56.33 km/h)33.06 mph (53.2 km/h)
40 mph (64.37 km/h)37.78 mph (60.8 km/h)
45 mph (72.42 km/h)42.5 mph (68.4 km/h)
50 mph (80.47 km/h)47.23 mph (76 km/h)
55 mph (88.51 km/h)51.95 mph (83.6 km/h)
60 mph (96.56 km/h)56.67 mph (91.2 km/h)
65 mph (104.61 km/h)61.39 mph (98.81 km/h)
70 mph (112.65 km/h)66.12 mph (106.41 km/h)
75 mph (120.7 km/h)70.84 mph (114.01 km/h)
80 mph (128.75 km/h)75.56 mph (121.61 km/h)
85 mph (136.79 km/h)80.29 mph (129.21 km/h)
90 mph (144.84 km/h)85.01 mph (136.81 km/h)
95 mph (152.89 km/h)89.73 mph (144.41 km/h)
100 mph (160.93 km/h)94.45 mph (152.01 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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