Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
26/11r12 vs 25/11r12 Tire Comparison Side By Side
  26/11-12 25/11-12 Difference
Diameter inches (mm) 26.06 (661.92) 24.96 (634.02) -1.1 (-27.9) -4.2%
Width inches (mm) 10.98 (279) 10.98 (279) 0 (0) 0%
Circum. inches (mm) 81.87 (2079.48) 78.42 (1991.83) -3.45 (-87.65) -4.2%
Sidewall Height inches (mm) 7.03 (178.56) 6.48 (164.61) -0.55 (-13.95) -7.8%
Revolutions per mile (km) 773.92 (480.89) 807.97 (502.05) 34.06 (21.16) 4.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.16 mph (30.83 km/h)
25 mph (40.23 km/h)23.95 mph (38.54 km/h)
30 mph (48.28 km/h)28.74 mph (46.25 km/h)
35 mph (56.33 km/h)33.52 mph (53.95 km/h)
40 mph (64.37 km/h)38.31 mph (61.66 km/h)
45 mph (72.42 km/h)43.1 mph (69.37 km/h)
50 mph (80.47 km/h)47.89 mph (77.08 km/h)
55 mph (88.51 km/h)52.68 mph (84.78 km/h)
60 mph (96.56 km/h)57.47 mph (92.49 km/h)
65 mph (104.61 km/h)62.26 mph (100.2 km/h)
70 mph (112.65 km/h)67.05 mph (107.91 km/h)
75 mph (120.7 km/h)71.84 mph (115.61 km/h)
80 mph (128.75 km/h)76.63 mph (123.32 km/h)
85 mph (136.79 km/h)81.42 mph (131.03 km/h)
90 mph (144.84 km/h)86.21 mph (138.74 km/h)
95 mph (152.89 km/h)91 mph (146.44 km/h)
100 mph (160.93 km/h)95.78 mph (154.15 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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