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 215/65r16 Tire Comparison Side By Side
  205/55-16 215/65-16 Difference
Diameter inches (mm) 24.88 (631.9) 27 (685.9) 2.13 (54) 8.5%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 78.16 (1985.17) 84.84 (2154.82) 6.68 (169.65) 8.5%
Sidewall Height inches (mm) 4.44 (112.75) 5.5 (139.75) 1.06 (27) 23.9%
Revolutions per mile (km) 810.68 (503.73) 746.86 (464.08) -63.82 (-39.66) -7.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.71 mph (34.94 km/h)
25 mph (40.23 km/h)27.14 mph (43.67 km/h)
30 mph (48.28 km/h)32.56 mph (52.41 km/h)
35 mph (56.33 km/h)37.99 mph (61.14 km/h)
40 mph (64.37 km/h)43.42 mph (69.88 km/h)
45 mph (72.42 km/h)48.85 mph (78.61 km/h)
50 mph (80.47 km/h)54.27 mph (87.34 km/h)
55 mph (88.51 km/h)59.7 mph (96.08 km/h)
60 mph (96.56 km/h)65.13 mph (104.81 km/h)
65 mph (104.61 km/h)70.55 mph (113.55 km/h)
70 mph (112.65 km/h)75.98 mph (122.28 km/h)
75 mph (120.7 km/h)81.41 mph (131.02 km/h)
80 mph (128.75 km/h)86.84 mph (139.75 km/h)
85 mph (136.79 km/h)92.26 mph (148.48 km/h)
90 mph (144.84 km/h)97.69 mph (157.22 km/h)
95 mph (152.89 km/h)103.12 mph (165.95 km/h)
100 mph (160.93 km/h)108.55 mph (174.69 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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