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 225/70r16 Tire Comparison Side By Side
  205/70-16 225/70-16 Difference
Diameter inches (mm) 27.3 (693.4) 28.4 (721.4) 1.1 (28) 4%
Width inches (mm) 8.07 (205) 8.86 (225) 0.79 (20) 9.8%
Circum. inches (mm) 85.76 (2178.38) 89.23 (2266.34) 3.46 (87.96) 4%
Sidewall Height inches (mm) 5.65 (143.5) 6.2 (157.5) 0.55 (14) 9.8%
Revolutions per mile (km) 738.78 (459.06) 710.11 (441.24) -28.67 (-17.82) -3.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.81 mph (33.49 km/h)
25 mph (40.23 km/h)26.01 mph (41.86 km/h)
30 mph (48.28 km/h)31.21 mph (50.23 km/h)
35 mph (56.33 km/h)36.41 mph (58.6 km/h)
40 mph (64.37 km/h)41.62 mph (66.97 km/h)
45 mph (72.42 km/h)46.82 mph (75.35 km/h)
50 mph (80.47 km/h)52.02 mph (83.72 km/h)
55 mph (88.51 km/h)57.22 mph (92.09 km/h)
60 mph (96.56 km/h)62.42 mph (100.46 km/h)
65 mph (104.61 km/h)67.62 mph (108.83 km/h)
70 mph (112.65 km/h)72.83 mph (117.2 km/h)
75 mph (120.7 km/h)78.03 mph (125.58 km/h)
80 mph (128.75 km/h)83.23 mph (133.95 km/h)
85 mph (136.79 km/h)88.43 mph (142.32 km/h)
90 mph (144.84 km/h)93.63 mph (150.69 km/h)
95 mph (152.89 km/h)98.84 mph (159.06 km/h)
100 mph (160.93 km/h)104.04 mph (167.43 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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