Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
185/55r16 vs 205/60r16 Tire Comparison Side By Side
  185/55-16 205/60-16 Difference
Diameter inches (mm) 24.01 (609.9) 25.69 (652.4) 1.67 (42.5) 7%
Width inches (mm) 7.28 (185) 8.07 (205) 0.79 (20) 10.8%
Circum. inches (mm) 75.44 (1916.06) 80.69 (2049.58) 5.26 (133.52) 7%
Sidewall Height inches (mm) 4.01 (101.75) 4.84 (123) 0.84 (21.25) 20.9%
Revolutions per mile (km) 839.92 (521.9) 785.21 (487.91) -54.72 (-34) -6.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.39 mph (34.43 km/h)
25 mph (40.23 km/h)26.74 mph (43.04 km/h)
30 mph (48.28 km/h)32.09 mph (51.64 km/h)
35 mph (56.33 km/h)37.44 mph (60.25 km/h)
40 mph (64.37 km/h)42.79 mph (68.86 km/h)
45 mph (72.42 km/h)48.14 mph (77.47 km/h)
50 mph (80.47 km/h)53.48 mph (86.07 km/h)
55 mph (88.51 km/h)58.83 mph (94.68 km/h)
60 mph (96.56 km/h)64.18 mph (103.29 km/h)
65 mph (104.61 km/h)69.53 mph (111.9 km/h)
70 mph (112.65 km/h)74.88 mph (120.5 km/h)
75 mph (120.7 km/h)80.23 mph (129.11 km/h)
80 mph (128.75 km/h)85.57 mph (137.72 km/h)
85 mph (136.79 km/h)90.92 mph (146.33 km/h)
90 mph (144.84 km/h)96.27 mph (154.93 km/h)
95 mph (152.89 km/h)101.62 mph (163.54 km/h)
100 mph (160.93 km/h)106.97 mph (172.15 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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