Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/70r16 vs 205/60r16 Tire Comparison Side By Side
  225/70-16 205/60-16 Difference
Diameter inches (mm) 28.4 (721.4) 25.69 (652.4) -2.72 (-69) -9.6%
Width inches (mm) 8.86 (225) 8.07 (205) -0.79 (-20) -8.9%
Circum. inches (mm) 89.23 (2266.34) 80.69 (2049.58) -8.53 (-216.77) -9.6%
Sidewall Height inches (mm) 6.2 (157.5) 4.84 (123) -1.36 (-34.5) -21.9%
Revolutions per mile (km) 710.11 (441.24) 785.21 (487.91) 75.1 (46.67) 10.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.09 mph (29.11 km/h)
25 mph (40.23 km/h)22.61 mph (36.39 km/h)
30 mph (48.28 km/h)27.13 mph (43.66 km/h)
35 mph (56.33 km/h)31.65 mph (50.94 km/h)
40 mph (64.37 km/h)36.17 mph (58.22 km/h)
45 mph (72.42 km/h)40.7 mph (65.49 km/h)
50 mph (80.47 km/h)45.22 mph (72.77 km/h)
55 mph (88.51 km/h)49.74 mph (80.05 km/h)
60 mph (96.56 km/h)54.26 mph (87.33 km/h)
65 mph (104.61 km/h)58.78 mph (94.6 km/h)
70 mph (112.65 km/h)63.3 mph (101.88 km/h)
75 mph (120.7 km/h)67.83 mph (109.16 km/h)
80 mph (128.75 km/h)72.35 mph (116.43 km/h)
85 mph (136.79 km/h)76.87 mph (123.71 km/h)
90 mph (144.84 km/h)81.39 mph (130.99 km/h)
95 mph (152.89 km/h)85.91 mph (138.26 km/h)
100 mph (160.93 km/h)90.44 mph (145.54 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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