Mike "Wuzzy121". Rest in peace, brother

Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/55r16 vs 225/50r16 Tire Comparison Side By Side
  205/55-16 225/50-16 Difference
Diameter inches (mm) 24.88 (631.9) 24.86 (631.4) -0.02 (-0.5) -0.1%
Width inches (mm) 8.07 (205) 8.86 (225) 0.79 (20) 9.8%
Circum. inches (mm) 78.16 (1985.17) 78.09 (1983.6) -0.06 (-1.57) -0.1%
Sidewall Height inches (mm) 4.44 (112.75) 4.43 (112.5) -0.01 (-0.25) -0.2%
Revolutions per mile (km) 810.68 (503.73) 811.32 (504.13) 0.64 (0.4) 0.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.98 mph (32.16 km/h)
25 mph (40.23 km/h)24.98 mph (40.2 km/h)
30 mph (48.28 km/h)29.98 mph (48.24 km/h)
35 mph (56.33 km/h)34.97 mph (56.28 km/h)
40 mph (64.37 km/h)39.97 mph (64.32 km/h)
45 mph (72.42 km/h)44.96 mph (72.36 km/h)
50 mph (80.47 km/h)49.96 mph (80.4 km/h)
55 mph (88.51 km/h)54.96 mph (88.44 km/h)
60 mph (96.56 km/h)59.95 mph (96.48 km/h)
65 mph (104.61 km/h)64.95 mph (104.52 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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