Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
165/55r16 vs 205/55r16 Tire Comparison Side By Side
  165/55-16 205/55-16 Difference
Diameter inches (mm) 23.15 (587.9) 24.88 (631.9) 1.73 (44) 7.5%
Width inches (mm) 6.5 (165) 8.07 (205) 1.57 (40) 24.2%
Circum. inches (mm) 72.71 (1846.94) 78.16 (1985.17) 5.44 (138.23) 7.5%
Sidewall Height inches (mm) 3.57 (90.75) 4.44 (112.75) 0.87 (22) 24.2%
Revolutions per mile (km) 871.36 (541.43) 810.68 (503.73) -60.67 (-37.7) -7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.5 mph (34.6 km/h)
25 mph (40.23 km/h)26.87 mph (43.24 km/h)
30 mph (48.28 km/h)32.25 mph (51.89 km/h)
35 mph (56.33 km/h)37.62 mph (60.54 km/h)
40 mph (64.37 km/h)42.99 mph (69.19 km/h)
45 mph (72.42 km/h)48.37 mph (77.84 km/h)
50 mph (80.47 km/h)53.74 mph (86.49 km/h)
55 mph (88.51 km/h)59.12 mph (95.14 km/h)
60 mph (96.56 km/h)64.49 mph (103.79 km/h)
65 mph (104.61 km/h)69.86 mph (112.44 km/h)
70 mph (112.65 km/h)75.24 mph (121.09 km/h)
75 mph (120.7 km/h)80.61 mph (129.73 km/h)
80 mph (128.75 km/h)85.99 mph (138.38 km/h)
85 mph (136.79 km/h)91.36 mph (147.03 km/h)
90 mph (144.84 km/h)96.74 mph (155.68 km/h)
95 mph (152.89 km/h)102.11 mph (164.33 km/h)
100 mph (160.93 km/h)107.48 mph (172.98 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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