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 295/30r28 Tire Comparison Side By Side
  325/35-28 295/30-28 Difference
Diameter inches (mm) 36.96 (938.7) 34.97 (888.2) -1.99 (-50.5) -5.4%
Width inches (mm) 12.8 (325) 11.61 (295) -1.18 (-30) -9.2%
Circum. inches (mm) 116.1 (2949.01) 109.86 (2790.36) -6.25 (-158.65) -5.4%
Sidewall Height inches (mm) 4.48 (113.75) 3.48 (88.5) -0.99 (-25.25) -22.2%
Revolutions per mile (km) 545.72 (339.1) 576.75 (358.38) 31.03 (19.28) 5.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.92 mph (30.46 km/h)
25 mph (40.23 km/h)23.66 mph (38.07 km/h)
30 mph (48.28 km/h)28.39 mph (45.68 km/h)
35 mph (56.33 km/h)33.12 mph (53.3 km/h)
40 mph (64.37 km/h)37.85 mph (60.91 km/h)
45 mph (72.42 km/h)42.58 mph (68.52 km/h)
50 mph (80.47 km/h)47.31 mph (76.14 km/h)
55 mph (88.51 km/h)52.04 mph (83.75 km/h)
60 mph (96.56 km/h)56.77 mph (91.37 km/h)
65 mph (104.61 km/h)61.5 mph (98.98 km/h)
70 mph (112.65 km/h)66.23 mph (106.59 km/h)
75 mph (120.7 km/h)70.97 mph (114.21 km/h)
80 mph (128.75 km/h)75.7 mph (121.82 km/h)
85 mph (136.79 km/h)80.43 mph (129.44 km/h)
90 mph (144.84 km/h)85.16 mph (137.05 km/h)
95 mph (152.89 km/h)89.89 mph (144.66 km/h)
100 mph (160.93 km/h)94.62 mph (152.28 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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