Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/70r16 vs 205/55r16 Tire Comparison Side By Side
  205/70-16 205/55-16 Difference
Diameter inches (mm) 27.3 (693.4) 24.88 (631.9) -2.42 (-61.5) -8.9%
Width inches (mm) 8.07 (205) 8.07 (205) 0 (0) 0%
Circum. inches (mm) 85.76 (2178.38) 78.16 (1985.17) -7.61 (-193.21) -8.9%
Sidewall Height inches (mm) 5.65 (143.5) 4.44 (112.75) -1.21 (-30.75) -21.4%
Revolutions per mile (km) 738.78 (459.06) 810.68 (503.73) 71.9 (44.68) 9.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.23 mph (29.33 km/h)
25 mph (40.23 km/h)22.78 mph (36.67 km/h)
30 mph (48.28 km/h)27.34 mph (44 km/h)
35 mph (56.33 km/h)31.9 mph (51.33 km/h)
40 mph (64.37 km/h)36.45 mph (58.66 km/h)
45 mph (72.42 km/h)41.01 mph (66 km/h)
50 mph (80.47 km/h)45.57 mph (73.33 km/h)
55 mph (88.51 km/h)50.12 mph (80.66 km/h)
60 mph (96.56 km/h)54.68 mph (88 km/h)
65 mph (104.61 km/h)59.23 mph (95.33 km/h)
70 mph (112.65 km/h)63.79 mph (102.66 km/h)
75 mph (120.7 km/h)68.35 mph (110 km/h)
80 mph (128.75 km/h)72.9 mph (117.33 km/h)
85 mph (136.79 km/h)77.46 mph (124.66 km/h)
90 mph (144.84 km/h)82.02 mph (131.99 km/h)
95 mph (152.89 km/h)86.57 mph (139.33 km/h)
100 mph (160.93 km/h)91.13 mph (146.66 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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