Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
24/8r12 vs 205/60r10 Tire Comparison Side By Side
  24/8-12 205/60-10 Difference
Diameter inches (mm) 23.99 (609.3) 19.69 (500) -4.3 (-109.3) -17.9%
Width inches (mm) 7.99 (203) 8.07 (205) 0.08 (2) 1%
Circum. inches (mm) 75.36 (1914.17) 61.84 (1570.8) -13.52 (-343.38) -17.9%
Sidewall Height inches (mm) 5.99 (152.25) 4.84 (123) -1.15 (-29.25) -19.2%
Revolutions per mile (km) 840.75 (522.42) 1024.54 (636.62) 183.79 (114.2) 21.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)16.41 mph (26.41 km/h)
25 mph (40.23 km/h)20.52 mph (33.02 km/h)
30 mph (48.28 km/h)24.62 mph (39.62 km/h)
35 mph (56.33 km/h)28.72 mph (46.22 km/h)
40 mph (64.37 km/h)32.82 mph (52.83 km/h)
45 mph (72.42 km/h)36.93 mph (59.43 km/h)
50 mph (80.47 km/h)41.03 mph (66.03 km/h)
55 mph (88.51 km/h)45.13 mph (72.64 km/h)
60 mph (96.56 km/h)49.24 mph (79.24 km/h)
65 mph (104.61 km/h)53.34 mph (85.84 km/h)
70 mph (112.65 km/h)57.44 mph (92.45 km/h)
75 mph (120.7 km/h)61.55 mph (99.05 km/h)
80 mph (128.75 km/h)65.65 mph (105.65 km/h)
85 mph (136.79 km/h)69.75 mph (112.26 km/h)
90 mph (144.84 km/h)73.86 mph (118.86 km/h)
95 mph (152.89 km/h)77.96 mph (125.46 km/h)
100 mph (160.93 km/h)82.06 mph (132.07 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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