Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/80r22.5 vs 33/12.5r22 Tire Comparison Side By Side
  225/80-22.5 33/12.5-22 Difference
Diameter inches (mm) 36.67 (931.5) 33.02 (838.64) -3.66 (-92.86) -10%
Width inches (mm) 8.86 (225) 12.52 (318) 3.66 (93) 41.3%
Circum. inches (mm) 115.21 (2926.39) 103.73 (2634.67) -11.49 (-291.73) -10%
Sidewall Height inches (mm) 7.09 (180) 5.51 (139.92) -1.58 (-40.08) -22.3%
Revolutions per mile (km) 549.94 (341.72) 610.83 (379.55) 60.89 (37.84) 11.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.01 mph (28.98 km/h)
25 mph (40.23 km/h)22.51 mph (36.22 km/h)
30 mph (48.28 km/h)27.01 mph (43.47 km/h)
35 mph (56.33 km/h)31.51 mph (50.71 km/h)
40 mph (64.37 km/h)36.01 mph (57.96 km/h)
45 mph (72.42 km/h)40.51 mph (65.2 km/h)
50 mph (80.47 km/h)45.02 mph (72.45 km/h)
55 mph (88.51 km/h)49.52 mph (79.69 km/h)
60 mph (96.56 km/h)54.02 mph (86.93 km/h)
65 mph (104.61 km/h)58.52 mph (94.18 km/h)
70 mph (112.65 km/h)63.02 mph (101.42 km/h)
75 mph (120.7 km/h)67.52 mph (108.67 km/h)
80 mph (128.75 km/h)72.02 mph (115.91 km/h)
85 mph (136.79 km/h)76.53 mph (123.16 km/h)
90 mph (144.84 km/h)81.03 mph (130.4 km/h)
95 mph (152.89 km/h)85.53 mph (137.65 km/h)
100 mph (160.93 km/h)90.03 mph (144.89 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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