Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/75r15 vs 275/25r22 Tire Comparison Side By Side
  275/75-15 275/25-22 Difference
Diameter inches (mm) 31.24 (793.5) 27.41 (696.3) -3.83 (-97.2) -12.2%
Width inches (mm) 10.83 (275) 10.83 (275) 0 (0) 0%
Circum. inches (mm) 98.14 (2492.85) 86.12 (2187.49) -12.02 (-305.36) -12.2%
Sidewall Height inches (mm) 8.12 (206.25) 2.71 (68.75) -5.41 (-137.5) -66.7%
Revolutions per mile (km) 645.58 (401.15) 735.7 (457.14) 90.12 (56) 14%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.55 mph (28.24 km/h)
25 mph (40.23 km/h)21.94 mph (35.31 km/h)
30 mph (48.28 km/h)26.33 mph (42.37 km/h)
35 mph (56.33 km/h)30.71 mph (49.43 km/h)
40 mph (64.37 km/h)35.1 mph (56.49 km/h)
45 mph (72.42 km/h)39.49 mph (63.55 km/h)
50 mph (80.47 km/h)43.88 mph (70.61 km/h)
55 mph (88.51 km/h)48.26 mph (77.67 km/h)
60 mph (96.56 km/h)52.65 mph (84.73 km/h)
65 mph (104.61 km/h)57.04 mph (91.79 km/h)
70 mph (112.65 km/h)61.43 mph (98.85 km/h)
75 mph (120.7 km/h)65.81 mph (105.92 km/h)
80 mph (128.75 km/h)70.2 mph (112.98 km/h)
85 mph (136.79 km/h)74.59 mph (120.04 km/h)
90 mph (144.84 km/h)78.98 mph (127.1 km/h)
95 mph (152.89 km/h)83.36 mph (134.16 km/h)
100 mph (160.93 km/h)87.75 mph (141.22 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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