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 25/10r12 Tire Comparison Side By Side
  26/11-12 25/10-12 Difference
Diameter inches (mm) 26.06 (661.92) 25 (635) -1.06 (-26.92) -4.1%
Width inches (mm) 10.98 (279) 10 (254) -0.98 (-25) -9%
Circum. inches (mm) 81.87 (2079.48) 78.54 (1994.91) -3.33 (-84.57) -4.1%
Sidewall Height inches (mm) 7.03 (178.56) 6.5 (165.1) -0.53 (-13.46) -7.5%
Revolutions per mile (km) 773.92 (480.89) 806.72 (501.27) 32.81 (20.39) 4.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.19 mph (30.88 km/h)
25 mph (40.23 km/h)23.98 mph (38.6 km/h)
30 mph (48.28 km/h)28.78 mph (46.32 km/h)
35 mph (56.33 km/h)33.58 mph (54.04 km/h)
40 mph (64.37 km/h)38.37 mph (61.76 km/h)
45 mph (72.42 km/h)43.17 mph (69.48 km/h)
50 mph (80.47 km/h)47.97 mph (77.19 km/h)
55 mph (88.51 km/h)52.76 mph (84.91 km/h)
60 mph (96.56 km/h)57.56 mph (92.63 km/h)
65 mph (104.61 km/h)62.36 mph (100.35 km/h)
70 mph (112.65 km/h)67.15 mph (108.07 km/h)
75 mph (120.7 km/h)71.95 mph (115.79 km/h)
80 mph (128.75 km/h)76.75 mph (123.51 km/h)
85 mph (136.79 km/h)81.54 mph (131.23 km/h)
90 mph (144.84 km/h)86.34 mph (138.95 km/h)
95 mph (152.89 km/h)91.14 mph (146.67 km/h)
100 mph (160.93 km/h)95.93 mph (154.39 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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