Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
325/35r28 vs 295/35r28 Tire Comparison Side By Side
  325/35-28 295/35-28 Difference
Diameter inches (mm) 36.96 (938.7) 36.13 (917.7) -0.83 (-21) -2.2%
Width inches (mm) 12.8 (325) 11.61 (295) -1.18 (-30) -9.2%
Circum. inches (mm) 116.1 (2949.01) 113.51 (2883.04) -2.6 (-65.97) -2.2%
Sidewall Height inches (mm) 4.48 (113.75) 4.06 (103.25) -0.41 (-10.5) -9.2%
Revolutions per mile (km) 545.72 (339.1) 558.21 (346.86) 12.49 (7.76) 2.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.55 mph (31.47 km/h)
25 mph (40.23 km/h)24.44 mph (39.33 km/h)
30 mph (48.28 km/h)29.33 mph (47.2 km/h)
35 mph (56.33 km/h)34.22 mph (55.07 km/h)
40 mph (64.37 km/h)39.11 mph (62.93 km/h)
45 mph (72.42 km/h)43.99 mph (70.8 km/h)
50 mph (80.47 km/h)48.88 mph (78.67 km/h)
55 mph (88.51 km/h)53.77 mph (86.53 km/h)
60 mph (96.56 km/h)58.66 mph (94.4 km/h)
65 mph (104.61 km/h)63.55 mph (102.27 km/h)
70 mph (112.65 km/h)68.43 mph (110.13 km/h)
75 mph (120.7 km/h)73.32 mph (118 km/h)
80 mph (128.75 km/h)78.21 mph (125.87 km/h)
85 mph (136.79 km/h)83.1 mph (133.73 km/h)
90 mph (144.84 km/h)87.99 mph (141.6 km/h)
95 mph (152.89 km/h)92.87 mph (149.47 km/h)
100 mph (160.93 km/h)97.76 mph (157.33 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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