Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/75r22.5 vs 275/55r22.5 Tire Comparison Side By Side
  265/75-22.5 275/55-22.5 Difference
Diameter inches (mm) 38.15 (969) 34.41 (874) -3.74 (-95) -9.8%
Width inches (mm) 10.43 (265) 10.83 (275) 0.39 (10) 3.8%
Circum. inches (mm) 119.85 (3044.2) 108.1 (2745.75) -11.75 (-298.45) -9.8%
Sidewall Height inches (mm) 7.82 (198.75) 5.95 (151.25) -1.87 (-47.5) -23.9%
Revolutions per mile (km) 528.66 (328.49) 586.12 (364.2) 57.46 (35.71) 10.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.04 mph (29.03 km/h)
25 mph (40.23 km/h)22.55 mph (36.29 km/h)
30 mph (48.28 km/h)27.06 mph (43.55 km/h)
35 mph (56.33 km/h)31.57 mph (50.8 km/h)
40 mph (64.37 km/h)36.08 mph (58.06 km/h)
45 mph (72.42 km/h)40.59 mph (65.32 km/h)
50 mph (80.47 km/h)45.1 mph (72.58 km/h)
55 mph (88.51 km/h)49.61 mph (79.84 km/h)
60 mph (96.56 km/h)54.12 mph (87.09 km/h)
65 mph (104.61 km/h)58.63 mph (94.35 km/h)
70 mph (112.65 km/h)63.14 mph (101.61 km/h)
75 mph (120.7 km/h)67.65 mph (108.87 km/h)
80 mph (128.75 km/h)72.16 mph (116.13 km/h)
85 mph (136.79 km/h)76.67 mph (123.38 km/h)
90 mph (144.84 km/h)81.18 mph (130.64 km/h)
95 mph (152.89 km/h)85.69 mph (137.9 km/h)
100 mph (160.93 km/h)90.2 mph (145.16 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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