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 265/75r16 Tire Comparison Side By Side
  33/11.5-15 265/75-16 Difference
Diameter inches (mm) 32.93 (836.52) 31.65 (803.9) -1.28 (-32.62) -3.9%
Width inches (mm) 11.5 (292) 10.43 (265) -1.06 (-27) -9.2%
Circum. inches (mm) 103.46 (2628.01) 99.43 (2525.53) -4.03 (-102.48) -3.9%
Sidewall Height inches (mm) 8.97 (227.76) 7.82 (198.75) -1.14 (-29.01) -12.7%
Revolutions per mile (km) 612.38 (380.52) 637.23 (395.96) 24.85 (15.44) 4.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.22 mph (30.93 km/h)
25 mph (40.23 km/h)24.03 mph (38.66 km/h)
30 mph (48.28 km/h)28.83 mph (46.4 km/h)
35 mph (56.33 km/h)33.64 mph (54.13 km/h)
40 mph (64.37 km/h)38.44 mph (61.86 km/h)
45 mph (72.42 km/h)43.25 mph (69.6 km/h)
50 mph (80.47 km/h)48.05 mph (77.33 km/h)
55 mph (88.51 km/h)52.86 mph (85.06 km/h)
60 mph (96.56 km/h)57.66 mph (92.8 km/h)
65 mph (104.61 km/h)62.47 mph (100.53 km/h)
70 mph (112.65 km/h)67.27 mph (108.26 km/h)
75 mph (120.7 km/h)72.08 mph (115.99 km/h)
80 mph (128.75 km/h)76.88 mph (123.73 km/h)
85 mph (136.79 km/h)81.69 mph (131.46 km/h)
90 mph (144.84 km/h)86.49 mph (139.19 km/h)
95 mph (152.89 km/h)91.3 mph (146.93 km/h)
100 mph (160.93 km/h)96.1 mph (154.66 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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