Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
33/11.5r15 vs 295/50r15 Tire Comparison Side By Side
  33/11.5-15 295/50-15 Difference
Diameter inches (mm) 32.93 (836.52) 26.61 (676) -6.32 (-160.52) -19.2%
Width inches (mm) 11.5 (292) 11.61 (295) 0.12 (3) 1%
Circum. inches (mm) 103.46 (2628.01) 83.61 (2123.72) -19.85 (-504.29) -19.2%
Sidewall Height inches (mm) 8.97 (227.76) 5.81 (147.5) -3.16 (-80.26) -35.2%
Revolutions per mile (km) 612.38 (380.52) 757.8 (470.87) 145.41 (90.36) 23.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)16.16 mph (26.01 km/h)
25 mph (40.23 km/h)20.2 mph (32.51 km/h)
30 mph (48.28 km/h)24.24 mph (39.02 km/h)
35 mph (56.33 km/h)28.28 mph (45.52 km/h)
40 mph (64.37 km/h)32.32 mph (52.02 km/h)
45 mph (72.42 km/h)36.36 mph (58.52 km/h)
50 mph (80.47 km/h)40.41 mph (65.03 km/h)
55 mph (88.51 km/h)44.45 mph (71.53 km/h)
60 mph (96.56 km/h)48.49 mph (78.03 km/h)
65 mph (104.61 km/h)52.53 mph (84.53 km/h)
70 mph (112.65 km/h)56.57 mph (91.04 km/h)
75 mph (120.7 km/h)60.61 mph (97.54 km/h)
80 mph (128.75 km/h)64.65 mph (104.04 km/h)
85 mph (136.79 km/h)68.69 mph (110.54 km/h)
90 mph (144.84 km/h)72.73 mph (117.05 km/h)
95 mph (152.89 km/h)76.77 mph (123.55 km/h)
100 mph (160.93 km/h)80.81 mph (130.05 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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