Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/75r22.5 vs 265/75r22.5 Tire Comparison Side By Side
  275/75-22.5 265/75-22.5 Difference
Diameter inches (mm) 38.74 (984) 38.15 (969) -0.59 (-15) -1.5%
Width inches (mm) 10.83 (275) 10.43 (265) -0.39 (-10) -3.6%
Circum. inches (mm) 121.71 (3091.33) 119.85 (3044.2) -1.86 (-47.12) -1.5%
Sidewall Height inches (mm) 8.12 (206.25) 7.82 (198.75) -0.3 (-7.5) -3.6%
Revolutions per mile (km) 520.6 (323.49) 528.66 (328.49) 8.06 (5.01) 1.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.7 mph (31.7 km/h)
25 mph (40.23 km/h)24.62 mph (39.62 km/h)
30 mph (48.28 km/h)29.54 mph (47.54 km/h)
35 mph (56.33 km/h)34.47 mph (55.47 km/h)
40 mph (64.37 km/h)39.39 mph (63.39 km/h)
45 mph (72.42 km/h)44.31 mph (71.32 km/h)
50 mph (80.47 km/h)49.24 mph (79.24 km/h)
55 mph (88.51 km/h)54.16 mph (87.16 km/h)
60 mph (96.56 km/h)59.09 mph (95.09 km/h)
65 mph (104.61 km/h)64.01 mph (103.01 km/h)
70 mph (112.65 km/h)68.93 mph (110.94 km/h)
75 mph (120.7 km/h)73.86 mph (118.86 km/h)
80 mph (128.75 km/h)78.78 mph (126.79 km/h)
85 mph (136.79 km/h)83.7 mph (134.71 km/h)
90 mph (144.84 km/h)88.63 mph (142.63 km/h)
95 mph (152.89 km/h)93.55 mph (150.56 km/h)
100 mph (160.93 km/h)98.48 mph (158.48 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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