Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/70r17 vs 215/60r17 Tire Comparison Side By Side
  205/70-17 215/60-17 Difference
Diameter inches (mm) 28.3 (718.8) 27.16 (689.8) -1.14 (-29) -4%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 88.9 (2258.18) 85.32 (2167.07) -3.59 (-91.11) -4%
Sidewall Height inches (mm) 5.65 (143.5) 5.08 (129) -0.57 (-14.5) -10.1%
Revolutions per mile (km) 712.67 (442.83) 742.64 (461.45) 29.96 (18.62) 4.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.19 mph (30.89 km/h)
25 mph (40.23 km/h)23.99 mph (38.61 km/h)
30 mph (48.28 km/h)28.79 mph (46.33 km/h)
35 mph (56.33 km/h)33.59 mph (54.05 km/h)
40 mph (64.37 km/h)38.39 mph (61.78 km/h)
45 mph (72.42 km/h)43.18 mph (69.5 km/h)
50 mph (80.47 km/h)47.98 mph (77.22 km/h)
55 mph (88.51 km/h)52.78 mph (84.94 km/h)
60 mph (96.56 km/h)57.58 mph (92.67 km/h)
65 mph (104.61 km/h)62.38 mph (100.39 km/h)
70 mph (112.65 km/h)67.18 mph (108.11 km/h)
75 mph (120.7 km/h)71.97 mph (115.83 km/h)
80 mph (128.75 km/h)76.77 mph (123.55 km/h)
85 mph (136.79 km/h)81.57 mph (131.28 km/h)
90 mph (144.84 km/h)86.37 mph (139 km/h)
95 mph (152.89 km/h)91.17 mph (146.72 km/h)
100 mph (160.93 km/h)95.97 mph (154.44 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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