Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
325/95r24 vs 230/95r24 Tire Comparison Side By Side
  325/95-24 230/95-24 Difference
Diameter inches (mm) 48.31 (1227.1) 41.2 (1046.6) -7.11 (-180.5) -14.7%
Width inches (mm) 12.8 (325) 9.06 (230) -3.74 (-95) -29.2%
Circum. inches (mm) 151.77 (3855.05) 129.45 (3287.99) -22.33 (-567.06) -14.7%
Sidewall Height inches (mm) 12.16 (308.75) 8.6 (218.5) -3.55 (-90.25) -29.2%
Revolutions per mile (km) 417.46 (259.4) 489.46 (304.14) 72 (44.74) 17.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.06 mph (27.45 km/h)
25 mph (40.23 km/h)21.32 mph (34.32 km/h)
30 mph (48.28 km/h)25.59 mph (41.18 km/h)
35 mph (56.33 km/h)29.85 mph (48.04 km/h)
40 mph (64.37 km/h)34.12 mph (54.9 km/h)
45 mph (72.42 km/h)38.38 mph (61.77 km/h)
50 mph (80.47 km/h)42.65 mph (68.63 km/h)
55 mph (88.51 km/h)46.91 mph (75.49 km/h)
60 mph (96.56 km/h)51.17 mph (82.36 km/h)
65 mph (104.61 km/h)55.44 mph (89.22 km/h)
70 mph (112.65 km/h)59.7 mph (96.08 km/h)
75 mph (120.7 km/h)63.97 mph (102.95 km/h)
80 mph (128.75 km/h)68.23 mph (109.81 km/h)
85 mph (136.79 km/h)72.5 mph (116.67 km/h)
90 mph (144.84 km/h)76.76 mph (123.54 km/h)
95 mph (152.89 km/h)81.03 mph (130.4 km/h)
100 mph (160.93 km/h)85.29 mph (137.26 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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