Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
33/14.5r22 vs 305/60r22 Tire Comparison Side By Side
  33/14.5-22 305/60-22 Difference
Diameter inches (mm) 33.01 (838.48) 36.41 (924.8) 3.4 (86.32) 10.3%
Width inches (mm) 14.49 (368) 12.01 (305) -2.48 (-63) -17.1%
Circum. inches (mm) 103.71 (2634.16) 114.38 (2905.34) 10.68 (271.18) 10.3%
Sidewall Height inches (mm) 5.51 (139.84) 7.2 (183) 1.7 (43.16) 30.9%
Revolutions per mile (km) 610.95 (379.63) 553.93 (344.19) -57.03 (-35.43) -9.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.06 mph (35.5 km/h)
25 mph (40.23 km/h)27.57 mph (44.38 km/h)
30 mph (48.28 km/h)33.09 mph (53.25 km/h)
35 mph (56.33 km/h)38.6 mph (62.13 km/h)
40 mph (64.37 km/h)44.12 mph (71 km/h)
45 mph (72.42 km/h)49.63 mph (79.88 km/h)
50 mph (80.47 km/h)55.15 mph (88.75 km/h)
55 mph (88.51 km/h)60.66 mph (97.63 km/h)
60 mph (96.56 km/h)66.18 mph (106.5 km/h)
65 mph (104.61 km/h)71.69 mph (115.38 km/h)
70 mph (112.65 km/h)77.21 mph (124.25 km/h)
75 mph (120.7 km/h)82.72 mph (133.13 km/h)
80 mph (128.75 km/h)88.24 mph (142 km/h)
85 mph (136.79 km/h)93.75 mph (150.88 km/h)
90 mph (144.84 km/h)99.27 mph (159.75 km/h)
95 mph (152.89 km/h)104.78 mph (168.63 km/h)
100 mph (160.93 km/h)110.29 mph (177.5 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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