Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/65r20 vs 275/55r20 Tire Comparison Side By Side
  295/65-20 275/55-20 Difference
Diameter inches (mm) 35.1 (891.5) 31.91 (810.5) -3.19 (-81) -9.1%
Width inches (mm) 11.61 (295) 10.83 (275) -0.79 (-20) -6.8%
Circum. inches (mm) 110.26 (2800.73) 100.25 (2546.26) -10.02 (-254.47) -9.1%
Sidewall Height inches (mm) 7.55 (191.75) 5.95 (151.25) -1.59 (-40.5) -21.1%
Revolutions per mile (km) 574.62 (357.05) 632.04 (392.73) 57.43 (35.68) 10%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.18 mph (29.26 km/h)
25 mph (40.23 km/h)22.73 mph (36.58 km/h)
30 mph (48.28 km/h)27.27 mph (43.89 km/h)
35 mph (56.33 km/h)31.82 mph (51.21 km/h)
40 mph (64.37 km/h)36.37 mph (58.52 km/h)
45 mph (72.42 km/h)40.91 mph (65.84 km/h)
50 mph (80.47 km/h)45.46 mph (73.16 km/h)
55 mph (88.51 km/h)50 mph (80.47 km/h)
60 mph (96.56 km/h)54.55 mph (87.79 km/h)
65 mph (104.61 km/h)59.09 mph (95.1 km/h)
70 mph (112.65 km/h)63.64 mph (102.42 km/h)
75 mph (120.7 km/h)68.19 mph (109.73 km/h)
80 mph (128.75 km/h)72.73 mph (117.05 km/h)
85 mph (136.79 km/h)77.28 mph (124.37 km/h)
90 mph (144.84 km/h)81.82 mph (131.68 km/h)
95 mph (152.89 km/h)86.37 mph (139 km/h)
100 mph (160.93 km/h)90.91 mph (146.31 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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