Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
365/75r16 vs 265/75r16 Tire Comparison Side By Side
  365/75-16 265/75-16 Difference
Diameter inches (mm) 37.56 (953.9) 31.65 (803.9) -5.91 (-150) -15.7%
Width inches (mm) 14.37 (365) 10.43 (265) -3.94 (-100) -27.4%
Circum. inches (mm) 117.98 (2996.77) 99.43 (2525.53) -18.55 (-471.24) -15.7%
Sidewall Height inches (mm) 10.78 (273.75) 7.82 (198.75) -2.95 (-75) -27.4%
Revolutions per mile (km) 537.03 (333.69) 637.23 (395.96) 100.2 (62.26) 18.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)16.86 mph (27.13 km/h)
25 mph (40.23 km/h)21.07 mph (33.91 km/h)
30 mph (48.28 km/h)25.28 mph (40.69 km/h)
35 mph (56.33 km/h)29.5 mph (47.47 km/h)
40 mph (64.37 km/h)33.71 mph (54.25 km/h)
45 mph (72.42 km/h)37.92 mph (61.03 km/h)
50 mph (80.47 km/h)42.14 mph (67.81 km/h)
55 mph (88.51 km/h)46.35 mph (74.6 km/h)
60 mph (96.56 km/h)50.57 mph (81.38 km/h)
65 mph (104.61 km/h)54.78 mph (88.16 km/h)
70 mph (112.65 km/h)58.99 mph (94.94 km/h)
75 mph (120.7 km/h)63.21 mph (101.72 km/h)
80 mph (128.75 km/h)67.42 mph (108.5 km/h)
85 mph (136.79 km/h)71.63 mph (115.28 km/h)
90 mph (144.84 km/h)75.85 mph (122.07 km/h)
95 mph (152.89 km/h)80.06 mph (128.85 km/h)
100 mph (160.93 km/h)84.28 mph (135.63 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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