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 305/55r22 Tire Comparison Side By Side
  33/14.5-22 305/55-22 Difference
Diameter inches (mm) 33.01 (838.48) 35.21 (894.3) 2.2 (55.82) 6.7%
Width inches (mm) 14.49 (368) 12.01 (305) -2.48 (-63) -17.1%
Circum. inches (mm) 103.71 (2634.16) 110.61 (2809.53) 6.9 (175.36) 6.7%
Sidewall Height inches (mm) 5.51 (139.84) 6.6 (167.75) 1.1 (27.91) 20%
Revolutions per mile (km) 610.95 (379.63) 572.82 (355.93) -38.13 (-23.7) -6.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.33 mph (34.33 km/h)
25 mph (40.23 km/h)26.66 mph (42.91 km/h)
30 mph (48.28 km/h)32 mph (51.49 km/h)
35 mph (56.33 km/h)37.33 mph (60.08 km/h)
40 mph (64.37 km/h)42.66 mph (68.66 km/h)
45 mph (72.42 km/h)48 mph (77.24 km/h)
50 mph (80.47 km/h)53.33 mph (85.82 km/h)
55 mph (88.51 km/h)58.66 mph (94.41 km/h)
60 mph (96.56 km/h)63.99 mph (102.99 km/h)
65 mph (104.61 km/h)69.33 mph (111.57 km/h)
70 mph (112.65 km/h)74.66 mph (120.15 km/h)
75 mph (120.7 km/h)79.99 mph (128.74 km/h)
80 mph (128.75 km/h)85.33 mph (137.32 km/h)
85 mph (136.79 km/h)90.66 mph (145.9 km/h)
90 mph (144.84 km/h)95.99 mph (154.48 km/h)
95 mph (152.89 km/h)101.32 mph (163.07 km/h)
100 mph (160.93 km/h)106.66 mph (171.65 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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