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 215/75r16 Tire Comparison Side By Side
  205/55-16 215/75-16 Difference
Diameter inches (mm) 24.88 (631.9) 28.7 (728.9) 3.82 (97) 15.4%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 78.16 (1985.17) 90.15 (2289.91) 12 (304.73) 15.4%
Sidewall Height inches (mm) 4.44 (112.75) 6.35 (161.25) 1.91 (48.5) 43%
Revolutions per mile (km) 810.68 (503.73) 702.8 (436.7) -107.88 (-67.04) -13.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23.07 mph (37.13 km/h)
25 mph (40.23 km/h)28.84 mph (46.41 km/h)
30 mph (48.28 km/h)34.61 mph (55.69 km/h)
35 mph (56.33 km/h)40.37 mph (64.97 km/h)
40 mph (64.37 km/h)46.14 mph (74.26 km/h)
45 mph (72.42 km/h)51.91 mph (83.54 km/h)
50 mph (80.47 km/h)57.68 mph (92.82 km/h)
55 mph (88.51 km/h)63.44 mph (102.1 km/h)
60 mph (96.56 km/h)69.21 mph (111.38 km/h)
65 mph (104.61 km/h)74.98 mph (120.67 km/h)
70 mph (112.65 km/h)80.75 mph (129.95 km/h)
75 mph (120.7 km/h)86.51 mph (139.23 km/h)
80 mph (128.75 km/h)92.28 mph (148.51 km/h)
85 mph (136.79 km/h)98.05 mph (157.79 km/h)
90 mph (144.84 km/h)103.82 mph (167.08 km/h)
95 mph (152.89 km/h)109.58 mph (176.36 km/h)
100 mph (160.93 km/h)115.35 mph (185.64 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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