Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/55r16 vs 225/65r16 Tire Comparison Side By Side
  225/55-16 225/65-16 Difference
Diameter inches (mm) 25.74 (653.9) 27.52 (698.9) 1.77 (45) 6.9%
Width inches (mm) 8.86 (225) 8.86 (225) 0 (0) 0%
Circum. inches (mm) 80.88 (2054.29) 86.44 (2195.66) 5.57 (141.37) 6.9%
Sidewall Height inches (mm) 4.87 (123.75) 5.76 (146.25) 0.89 (22.5) 18.2%
Revolutions per mile (km) 783.41 (486.79) 732.97 (455.44) -50.44 (-31.34) -6.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.38 mph (34.4 km/h)
25 mph (40.23 km/h)26.72 mph (43 km/h)
30 mph (48.28 km/h)32.06 mph (51.6 km/h)
35 mph (56.33 km/h)37.41 mph (60.2 km/h)
40 mph (64.37 km/h)42.75 mph (68.8 km/h)
45 mph (72.42 km/h)48.1 mph (77.4 km/h)
50 mph (80.47 km/h)53.44 mph (86 km/h)
55 mph (88.51 km/h)58.78 mph (94.61 km/h)
60 mph (96.56 km/h)64.13 mph (103.21 km/h)
65 mph (104.61 km/h)69.47 mph (111.81 km/h)
70 mph (112.65 km/h)74.82 mph (120.41 km/h)
75 mph (120.7 km/h)80.16 mph (129.01 km/h)
80 mph (128.75 km/h)85.51 mph (137.61 km/h)
85 mph (136.79 km/h)90.85 mph (146.21 km/h)
90 mph (144.84 km/h)96.19 mph (154.81 km/h)
95 mph (152.89 km/h)101.54 mph (163.41 km/h)
100 mph (160.93 km/h)106.88 mph (172.01 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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