Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/75r17 vs 255/75r17 Tire Comparison Side By Side
  265/75-17 255/75-17 Difference
Diameter inches (mm) 32.65 (829.3) 32.06 (814.3) -0.59 (-15) -1.8%
Width inches (mm) 10.43 (265) 10.04 (255) -0.39 (-10) -3.8%
Circum. inches (mm) 102.57 (2605.32) 100.72 (2558.2) -1.86 (-47.12) -1.8%
Sidewall Height inches (mm) 7.82 (198.75) 7.53 (191.25) -0.3 (-7.5) -3.8%
Revolutions per mile (km) 617.71 (383.83) 629.09 (390.9) 11.38 (7.07) 1.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.64 mph (31.6 km/h)
25 mph (40.23 km/h)24.55 mph (39.51 km/h)
30 mph (48.28 km/h)29.46 mph (47.41 km/h)
35 mph (56.33 km/h)34.37 mph (55.31 km/h)
40 mph (64.37 km/h)39.28 mph (63.21 km/h)
45 mph (72.42 km/h)44.19 mph (71.11 km/h)
50 mph (80.47 km/h)49.1 mph (79.01 km/h)
55 mph (88.51 km/h)54.01 mph (86.91 km/h)
60 mph (96.56 km/h)58.91 mph (94.81 km/h)
65 mph (104.61 km/h)63.82 mph (102.72 km/h)
70 mph (112.65 km/h)68.73 mph (110.62 km/h)
75 mph (120.7 km/h)73.64 mph (118.52 km/h)
80 mph (128.75 km/h)78.55 mph (126.42 km/h)
85 mph (136.79 km/h)83.46 mph (134.32 km/h)
90 mph (144.84 km/h)88.37 mph (142.22 km/h)
95 mph (152.89 km/h)93.28 mph (150.12 km/h)
100 mph (160.93 km/h)98.19 mph (158.02 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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