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 27/11r14 Tire Comparison Side By Side
  26/11-12 27/11-14 Difference
Diameter inches (mm) 26.06 (661.92) 26.96 (684.82) 0.9 (22.9) 3.5%
Width inches (mm) 10.98 (279) 10.98 (279) 0 (0) 0%
Circum. inches (mm) 81.87 (2079.48) 84.7 (2151.43) 2.83 (71.94) 3.5%
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) 748.04 (464.81) -25.88 (-16.08) -3.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.69 mph (33.3 km/h)
25 mph (40.23 km/h)25.86 mph (41.63 km/h)
30 mph (48.28 km/h)31.04 mph (49.95 km/h)
35 mph (56.33 km/h)36.21 mph (58.28 km/h)
40 mph (64.37 km/h)41.38 mph (66.6 km/h)
45 mph (72.42 km/h)46.56 mph (74.93 km/h)
50 mph (80.47 km/h)51.73 mph (83.25 km/h)
55 mph (88.51 km/h)56.9 mph (91.58 km/h)
60 mph (96.56 km/h)62.08 mph (99.9 km/h)
65 mph (104.61 km/h)67.25 mph (108.23 km/h)
70 mph (112.65 km/h)72.42 mph (116.55 km/h)
75 mph (120.7 km/h)77.59 mph (124.88 km/h)
80 mph (128.75 km/h)82.77 mph (133.2 km/h)
85 mph (136.79 km/h)87.94 mph (141.53 km/h)
90 mph (144.84 km/h)93.11 mph (149.85 km/h)
95 mph (152.89 km/h)98.29 mph (158.18 km/h)
100 mph (160.93 km/h)103.46 mph (166.5 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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