Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/55r16 vs 215/60r17 Tire Comparison Side By Side
  205/55-16 215/60-17 Difference
Diameter inches (mm) 24.88 (631.9) 27.16 (689.8) 2.28 (57.9) 9.2%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 78.16 (1985.17) 85.32 (2167.07) 7.16 (181.9) 9.2%
Sidewall Height inches (mm) 4.44 (112.75) 5.08 (129) 0.64 (16.25) 14.4%
Revolutions per mile (km) 810.68 (503.73) 742.64 (461.45) -68.05 (-42.28) -8.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.83 mph (35.14 km/h)
25 mph (40.23 km/h)27.29 mph (43.92 km/h)
30 mph (48.28 km/h)32.75 mph (52.7 km/h)
35 mph (56.33 km/h)38.21 mph (61.49 km/h)
40 mph (64.37 km/h)43.67 mph (70.27 km/h)
45 mph (72.42 km/h)49.12 mph (79.06 km/h)
50 mph (80.47 km/h)54.58 mph (87.84 km/h)
55 mph (88.51 km/h)60.04 mph (96.62 km/h)
60 mph (96.56 km/h)65.5 mph (105.41 km/h)
65 mph (104.61 km/h)70.96 mph (114.19 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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