Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/60r20 vs 275/60r20 Tire Comparison Side By Side
  295/60-20 275/60-20 Difference
Diameter inches (mm) 33.94 (862) 32.99 (838) -0.94 (-24) -2.8%
Width inches (mm) 11.61 (295) 10.83 (275) -0.79 (-20) -6.8%
Circum. inches (mm) 106.62 (2708.05) 103.65 (2632.65) -2.97 (-75.4) -2.8%
Sidewall Height inches (mm) 6.97 (177) 6.5 (165) -0.47 (-12) -6.8%
Revolutions per mile (km) 594.28 (369.27) 611.3 (379.84) 17.02 (10.58) 2.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.44 mph (31.29 km/h)
25 mph (40.23 km/h)24.3 mph (39.11 km/h)
30 mph (48.28 km/h)29.16 mph (46.94 km/h)
35 mph (56.33 km/h)34.03 mph (54.76 km/h)
40 mph (64.37 km/h)38.89 mph (62.58 km/h)
45 mph (72.42 km/h)43.75 mph (70.4 km/h)
50 mph (80.47 km/h)48.61 mph (78.23 km/h)
55 mph (88.51 km/h)53.47 mph (86.05 km/h)
60 mph (96.56 km/h)58.33 mph (93.87 km/h)
65 mph (104.61 km/h)63.19 mph (101.7 km/h)
70 mph (112.65 km/h)68.05 mph (109.52 km/h)
75 mph (120.7 km/h)72.91 mph (117.34 km/h)
80 mph (128.75 km/h)77.77 mph (125.16 km/h)
85 mph (136.79 km/h)82.63 mph (132.99 km/h)
90 mph (144.84 km/h)87.49 mph (140.81 km/h)
95 mph (152.89 km/h)92.35 mph (148.63 km/h)
100 mph (160.93 km/h)97.22 mph (156.45 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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