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 295/25r28 Tire Comparison Side By Side
  325/35-28 295/25-28 Difference
Diameter inches (mm) 36.96 (938.7) 33.81 (858.7) -3.15 (-80) -8.5%
Width inches (mm) 12.8 (325) 11.61 (295) -1.18 (-30) -9.2%
Circum. inches (mm) 116.1 (2949.01) 106.21 (2697.69) -9.89 (-251.33) -8.5%
Sidewall Height inches (mm) 4.48 (113.75) 2.9 (73.75) -1.57 (-40) -35.2%
Revolutions per mile (km) 545.72 (339.1) 596.56 (370.69) 50.84 (31.59) 9.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.3 mph (29.44 km/h)
25 mph (40.23 km/h)22.87 mph (36.8 km/h)
30 mph (48.28 km/h)27.44 mph (44.17 km/h)
35 mph (56.33 km/h)32.02 mph (51.53 km/h)
40 mph (64.37 km/h)36.59 mph (58.89 km/h)
45 mph (72.42 km/h)41.16 mph (66.25 km/h)
50 mph (80.47 km/h)45.74 mph (73.61 km/h)
55 mph (88.51 km/h)50.31 mph (80.97 km/h)
60 mph (96.56 km/h)54.89 mph (88.33 km/h)
65 mph (104.61 km/h)59.46 mph (95.69 km/h)
70 mph (112.65 km/h)64.03 mph (103.05 km/h)
75 mph (120.7 km/h)68.61 mph (110.41 km/h)
80 mph (128.75 km/h)73.18 mph (117.78 km/h)
85 mph (136.79 km/h)77.76 mph (125.14 km/h)
90 mph (144.84 km/h)82.33 mph (132.5 km/h)
95 mph (152.89 km/h)86.9 mph (139.86 km/h)
100 mph (160.93 km/h)91.48 mph (147.22 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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