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 35/12.5r17 Tire Comparison Side By Side
  325/95-24 35/12.5-17 Difference
Diameter inches (mm) 48.31 (1227.1) 35.03 (889.72) -13.28 (-337.38) -27.5%
Width inches (mm) 12.8 (325) 12.52 (318) -0.28 (-7) -2.2%
Circum. inches (mm) 151.77 (3855.05) 110.04 (2795.14) -41.73 (-1059.91) -27.5%
Sidewall Height inches (mm) 12.16 (308.75) 9.01 (228.96) -3.14 (-79.79) -25.8%
Revolutions per mile (km) 417.46 (259.4) 575.77 (357.76) 158.3 (98.36) 37.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)14.5 mph (23.34 km/h)
25 mph (40.23 km/h)18.13 mph (29.17 km/h)
30 mph (48.28 km/h)21.75 mph (35.01 km/h)
35 mph (56.33 km/h)25.38 mph (40.84 km/h)
40 mph (64.37 km/h)29 mph (46.67 km/h)
45 mph (72.42 km/h)32.63 mph (52.51 km/h)
50 mph (80.47 km/h)36.25 mph (58.34 km/h)
55 mph (88.51 km/h)39.88 mph (64.18 km/h)
60 mph (96.56 km/h)43.5 mph (70.01 km/h)
65 mph (104.61 km/h)47.13 mph (75.85 km/h)
70 mph (112.65 km/h)50.75 mph (81.68 km/h)
75 mph (120.7 km/h)54.38 mph (87.52 km/h)
80 mph (128.75 km/h)58 mph (93.35 km/h)
85 mph (136.79 km/h)61.63 mph (99.18 km/h)
90 mph (144.84 km/h)65.26 mph (105.02 km/h)
95 mph (152.89 km/h)68.88 mph (110.85 km/h)
100 mph (160.93 km/h)72.51 mph (116.69 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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