Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/45r22 vs 225/65r16 Tire Comparison Side By Side
  235/45-22 225/65-16 Difference
Diameter inches (mm) 30.33 (770.3) 27.52 (698.9) -2.81 (-71.4) -9.3%
Width inches (mm) 9.25 (235) 8.86 (225) -0.39 (-10) -4.3%
Circum. inches (mm) 95.27 (2419.97) 86.44 (2195.66) -8.83 (-224.31) -9.3%
Sidewall Height inches (mm) 4.16 (105.75) 5.76 (146.25) 1.59 (40.5) 38.3%
Revolutions per mile (km) 665.03 (413.23) 732.97 (455.44) 67.94 (42.22) 10.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.15 mph (29.2 km/h)
25 mph (40.23 km/h)22.68 mph (36.5 km/h)
30 mph (48.28 km/h)27.22 mph (43.81 km/h)
35 mph (56.33 km/h)31.76 mph (51.11 km/h)
40 mph (64.37 km/h)36.29 mph (58.41 km/h)
45 mph (72.42 km/h)40.83 mph (65.71 km/h)
50 mph (80.47 km/h)45.37 mph (73.01 km/h)
55 mph (88.51 km/h)49.9 mph (80.31 km/h)
60 mph (96.56 km/h)54.44 mph (87.61 km/h)
65 mph (104.61 km/h)58.98 mph (94.91 km/h)
70 mph (112.65 km/h)63.51 mph (102.21 km/h)
75 mph (120.7 km/h)68.05 mph (109.51 km/h)
80 mph (128.75 km/h)72.58 mph (116.81 km/h)
85 mph (136.79 km/h)77.12 mph (124.11 km/h)
90 mph (144.84 km/h)81.66 mph (131.42 km/h)
95 mph (152.89 km/h)86.19 mph (138.72 km/h)
100 mph (160.93 km/h)90.73 mph (146.02 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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