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
225/55r16 vs 205/55r16 Tire Comparison Side By Side
  225/55-16 205/55-16 Difference
Diameter inches (mm) 25.74 (653.9) 24.88 (631.9) -0.87 (-22) -3.4%
Width inches (mm) 8.86 (225) 8.07 (205) -0.79 (-20) -8.9%
Circum. inches (mm) 80.88 (2054.29) 78.16 (1985.17) -2.72 (-69.12) -3.4%
Sidewall Height inches (mm) 4.87 (123.75) 4.44 (112.75) -0.43 (-11) -8.9%
Revolutions per mile (km) 783.41 (486.79) 810.68 (503.73) 27.27 (16.95) 3.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.33 mph (31.1 km/h)
25 mph (40.23 km/h)24.16 mph (38.88 km/h)
30 mph (48.28 km/h)28.99 mph (46.66 km/h)
35 mph (56.33 km/h)33.82 mph (54.43 km/h)
40 mph (64.37 km/h)38.65 mph (62.21 km/h)
45 mph (72.42 km/h)43.49 mph (69.98 km/h)
50 mph (80.47 km/h)48.32 mph (77.76 km/h)
55 mph (88.51 km/h)53.15 mph (85.54 km/h)
60 mph (96.56 km/h)57.98 mph (93.31 km/h)
65 mph (104.61 km/h)62.81 mph (101.09 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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