Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/50r16 vs 225/60r16 Tire Comparison Side By Side
  255/50-16 225/60-16 Difference
Diameter inches (mm) 26.04 (661.4) 26.63 (676.4) 0.59 (15) 2.3%
Width inches (mm) 10.04 (255) 8.86 (225) -1.18 (-30) -11.8%
Circum. inches (mm) 81.81 (2077.85) 83.66 (2124.97) 1.86 (47.12) 2.3%
Sidewall Height inches (mm) 5.02 (127.5) 5.31 (135) 0.3 (7.5) 5.9%
Revolutions per mile (km) 774.52 (481.27) 757.35 (470.59) -17.18 (-10.67) -2.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.45 mph (32.92 km/h)
25 mph (40.23 km/h)25.57 mph (41.15 km/h)
30 mph (48.28 km/h)30.68 mph (49.38 km/h)
35 mph (56.33 km/h)35.79 mph (57.6 km/h)
40 mph (64.37 km/h)40.91 mph (65.83 km/h)
45 mph (72.42 km/h)46.02 mph (74.06 km/h)
50 mph (80.47 km/h)51.13 mph (82.29 km/h)
55 mph (88.51 km/h)56.25 mph (90.52 km/h)
60 mph (96.56 km/h)61.36 mph (98.75 km/h)
65 mph (104.61 km/h)66.47 mph (106.98 km/h)
70 mph (112.65 km/h)71.59 mph (115.21 km/h)
75 mph (120.7 km/h)76.7 mph (123.44 km/h)
80 mph (128.75 km/h)81.81 mph (131.67 km/h)
85 mph (136.79 km/h)86.93 mph (139.9 km/h)
90 mph (144.84 km/h)92.04 mph (148.13 km/h)
95 mph (152.89 km/h)97.15 mph (156.36 km/h)
100 mph (160.93 km/h)102.27 mph (164.58 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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