Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
26/10r12 vs 26/8r12 Tire Comparison Side By Side
  26/10-12 26/8-12 Difference
Diameter inches (mm) 26 (660.4) 26.07 (662.08) 0.07 (1.68) 0.3%
Width inches (mm) 10 (254) 7.99 (203) -2.01 (-51) -20.1%
Circum. inches (mm) 81.68 (2074.71) 81.89 (2079.99) 0.21 (5.28) 0.3%
Sidewall Height inches (mm) 7 (177.8) 7.03 (178.64) 0.03 (0.84) 0.5%
Revolutions per mile (km) 775.7 (481.99) 773.73 (480.77) -1.97 (-1.22) -0.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.05 mph (32.27 km/h)
25 mph (40.23 km/h)25.06 mph (40.34 km/h)
30 mph (48.28 km/h)30.08 mph (48.4 km/h)
35 mph (56.33 km/h)35.09 mph (56.47 km/h)
40 mph (64.37 km/h)40.1 mph (64.54 km/h)
45 mph (72.42 km/h)45.11 mph (72.6 km/h)
50 mph (80.47 km/h)50.13 mph (80.67 km/h)
55 mph (88.51 km/h)55.14 mph (88.74 km/h)
60 mph (96.56 km/h)60.15 mph (96.81 km/h)
65 mph (104.61 km/h)65.17 mph (104.87 km/h)
70 mph (112.65 km/h)70.18 mph (112.94 km/h)
75 mph (120.7 km/h)75.19 mph (121.01 km/h)
80 mph (128.75 km/h)80.2 mph (129.08 km/h)
85 mph (136.79 km/h)85.22 mph (137.14 km/h)
90 mph (144.84 km/h)90.23 mph (145.21 km/h)
95 mph (152.89 km/h)95.24 mph (153.28 km/h)
100 mph (160.93 km/h)100.25 mph (161.34 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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