Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/90r16 vs 205/55r16 Tire Comparison Side By Side
  205/90-16 205/55-16 Difference
Diameter inches (mm) 30.53 (775.4) 24.88 (631.9) -5.65 (-143.5) -18.5%
Width inches (mm) 8.07 (205) 8.07 (205) 0 (0) 0%
Circum. inches (mm) 95.91 (2435.99) 78.16 (1985.17) -17.75 (-450.82) -18.5%
Sidewall Height inches (mm) 7.26 (184.5) 4.44 (112.75) -2.82 (-71.75) -38.9%
Revolutions per mile (km) 660.65 (410.51) 810.68 (503.73) 150.03 (93.22) 22.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)16.3 mph (26.23 km/h)
25 mph (40.23 km/h)20.37 mph (32.79 km/h)
30 mph (48.28 km/h)24.45 mph (39.35 km/h)
35 mph (56.33 km/h)28.52 mph (45.9 km/h)
40 mph (64.37 km/h)32.6 mph (52.46 km/h)
45 mph (72.42 km/h)36.67 mph (59.02 km/h)
50 mph (80.47 km/h)40.75 mph (65.58 km/h)
55 mph (88.51 km/h)44.82 mph (72.13 km/h)
60 mph (96.56 km/h)48.9 mph (78.69 km/h)
65 mph (104.61 km/h)52.97 mph (85.25 km/h)
70 mph (112.65 km/h)57.05 mph (91.81 km/h)
75 mph (120.7 km/h)61.12 mph (98.36 km/h)
80 mph (128.75 km/h)65.19 mph (104.92 km/h)
85 mph (136.79 km/h)69.27 mph (111.48 km/h)
90 mph (144.84 km/h)73.34 mph (118.04 km/h)
95 mph (152.89 km/h)77.42 mph (124.59 km/h)
100 mph (160.93 km/h)81.49 mph (131.15 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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