Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/75r17 vs 33/12.5r17 Tire Comparison Side By Side
  295/75-17 33/12.5-17 Difference
Diameter inches (mm) 34.42 (874.3) 33.03 (838.84) -1.4 (-35.46) -4.1%
Width inches (mm) 11.61 (295) 12.52 (318) 0.91 (23) 7.8%
Circum. inches (mm) 108.14 (2746.69) 103.75 (2635.29) -4.39 (-111.4) -4.1%
Sidewall Height inches (mm) 8.71 (221.25) 8.01 (203.52) -0.7 (-17.73) -8%
Revolutions per mile (km) 585.92 (364.07) 610.69 (379.46) 24.77 (15.39) 4.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.19 mph (30.88 km/h)
25 mph (40.23 km/h)23.99 mph (38.6 km/h)
30 mph (48.28 km/h)28.78 mph (46.32 km/h)
35 mph (56.33 km/h)33.58 mph (54.04 km/h)
40 mph (64.37 km/h)38.38 mph (61.76 km/h)
45 mph (72.42 km/h)43.17 mph (69.48 km/h)
50 mph (80.47 km/h)47.97 mph (77.2 km/h)
55 mph (88.51 km/h)52.77 mph (84.92 km/h)
60 mph (96.56 km/h)57.57 mph (92.64 km/h)
65 mph (104.61 km/h)62.36 mph (100.36 km/h)
70 mph (112.65 km/h)67.16 mph (108.09 km/h)
75 mph (120.7 km/h)71.96 mph (115.81 km/h)
80 mph (128.75 km/h)76.76 mph (123.53 km/h)
85 mph (136.79 km/h)81.55 mph (131.25 km/h)
90 mph (144.84 km/h)86.35 mph (138.97 km/h)
95 mph (152.89 km/h)91.15 mph (146.69 km/h)
100 mph (160.93 km/h)95.94 mph (154.41 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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