Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/70r22.5 vs 255/80r22.5 Tire Comparison Side By Side
  275/70-22.5 255/80-22.5 Difference
Diameter inches (mm) 37.66 (956.5) 38.56 (979.5) 0.91 (23) 2.4%
Width inches (mm) 10.83 (275) 10.04 (255) -0.79 (-20) -7.3%
Circum. inches (mm) 118.3 (3004.93) 121.15 (3077.19) 2.84 (72.26) 2.4%
Sidewall Height inches (mm) 7.58 (192.5) 8.03 (204) 0.45 (11.5) 6%
Revolutions per mile (km) 535.57 (332.79) 522.99 (324.97) -12.58 (-7.81) -2.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.48 mph (32.96 km/h)
25 mph (40.23 km/h)25.6 mph (41.2 km/h)
30 mph (48.28 km/h)30.72 mph (49.44 km/h)
35 mph (56.33 km/h)35.84 mph (57.68 km/h)
40 mph (64.37 km/h)40.96 mph (65.92 km/h)
45 mph (72.42 km/h)46.08 mph (74.16 km/h)
50 mph (80.47 km/h)51.2 mph (82.4 km/h)
55 mph (88.51 km/h)56.32 mph (90.64 km/h)
60 mph (96.56 km/h)61.44 mph (98.88 km/h)
65 mph (104.61 km/h)66.56 mph (107.12 km/h)
70 mph (112.65 km/h)71.68 mph (115.36 km/h)
75 mph (120.7 km/h)76.8 mph (123.6 km/h)
80 mph (128.75 km/h)81.92 mph (131.84 km/h)
85 mph (136.79 km/h)87.04 mph (140.08 km/h)
90 mph (144.84 km/h)92.16 mph (148.32 km/h)
95 mph (152.89 km/h)97.28 mph (156.56 km/h)
100 mph (160.93 km/h)102.4 mph (164.8 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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