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 275/65r20 Tire Comparison Side By Side
  295/65-20 275/65-20 Difference
Diameter inches (mm) 35.1 (891.5) 34.07 (865.5) -1.02 (-26) -2.9%
Width inches (mm) 11.61 (295) 10.83 (275) -0.79 (-20) -6.8%
Circum. inches (mm) 110.26 (2800.73) 107.05 (2719.05) -3.22 (-81.68) -2.9%
Sidewall Height inches (mm) 7.55 (191.75) 7.04 (178.75) -0.51 (-13) -6.8%
Revolutions per mile (km) 574.62 (357.05) 591.88 (367.78) 17.26 (10.73) 3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.42 mph (31.25 km/h)
25 mph (40.23 km/h)24.27 mph (39.06 km/h)
30 mph (48.28 km/h)29.13 mph (46.87 km/h)
35 mph (56.33 km/h)33.98 mph (54.68 km/h)
40 mph (64.37 km/h)38.83 mph (62.5 km/h)
45 mph (72.42 km/h)43.69 mph (70.31 km/h)
50 mph (80.47 km/h)48.54 mph (78.12 km/h)
55 mph (88.51 km/h)53.4 mph (85.93 km/h)
60 mph (96.56 km/h)58.25 mph (93.74 km/h)
65 mph (104.61 km/h)63.1 mph (101.56 km/h)
70 mph (112.65 km/h)67.96 mph (109.37 km/h)
75 mph (120.7 km/h)72.81 mph (117.18 km/h)
80 mph (128.75 km/h)77.67 mph (124.99 km/h)
85 mph (136.79 km/h)82.52 mph (132.8 km/h)
90 mph (144.84 km/h)87.38 mph (140.62 km/h)
95 mph (152.89 km/h)92.23 mph (148.43 km/h)
100 mph (160.93 km/h)97.08 mph (156.24 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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