Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
26/12r12 vs 195/60r14 Tire Comparison Side By Side
  26/12-12 195/60-14 Difference
Diameter inches (mm) 25.93 (658.6) 23.21 (589.6) -2.72 (-69) -10.5%
Width inches (mm) 12.01 (305) 7.68 (195) -4.33 (-110) -36.1%
Circum. inches (mm) 81.46 (2069.05) 72.92 (1852.28) -8.53 (-216.77) -10.5%
Sidewall Height inches (mm) 6.96 (176.9) 4.61 (117) -2.36 (-59.9) -33.9%
Revolutions per mile (km) 777.82 (483.31) 868.84 (539.87) 91.03 (56.56) 11.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.9 mph (28.81 km/h)
25 mph (40.23 km/h)22.38 mph (36.02 km/h)
30 mph (48.28 km/h)26.86 mph (43.22 km/h)
35 mph (56.33 km/h)31.33 mph (50.43 km/h)
40 mph (64.37 km/h)35.81 mph (57.63 km/h)
45 mph (72.42 km/h)40.29 mph (64.83 km/h)
50 mph (80.47 km/h)44.76 mph (72.04 km/h)
55 mph (88.51 km/h)49.24 mph (79.24 km/h)
60 mph (96.56 km/h)53.71 mph (86.44 km/h)
65 mph (104.61 km/h)58.19 mph (93.65 km/h)
70 mph (112.65 km/h)62.67 mph (100.85 km/h)
75 mph (120.7 km/h)67.14 mph (108.06 km/h)
80 mph (128.75 km/h)71.62 mph (115.26 km/h)
85 mph (136.79 km/h)76.09 mph (122.46 km/h)
90 mph (144.84 km/h)80.57 mph (129.67 km/h)
95 mph (152.89 km/h)85.05 mph (136.87 km/h)
100 mph (160.93 km/h)89.52 mph (144.07 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
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