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 255/75r12 Tire Comparison Side By Side
  26/10-12 255/75-12 Difference
Diameter inches (mm) 26 (660.4) 27.06 (687.3) 1.06 (26.9) 4.1%
Width inches (mm) 10 (254) 10.04 (255) 0.04 (1) 0.4%
Circum. inches (mm) 81.68 (2074.71) 85.01 (2159.22) 3.33 (84.51) 4.1%
Sidewall Height inches (mm) 7 (177.8) 7.53 (191.25) 0.53 (13.45) 7.6%
Revolutions per mile (km) 775.7 (481.99) 745.34 (463.13) -30.36 (-18.86) -3.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.81 mph (33.5 km/h)
25 mph (40.23 km/h)26.02 mph (41.87 km/h)
30 mph (48.28 km/h)31.22 mph (50.25 km/h)
35 mph (56.33 km/h)36.43 mph (58.62 km/h)
40 mph (64.37 km/h)41.63 mph (67 km/h)
45 mph (72.42 km/h)46.83 mph (75.37 km/h)
50 mph (80.47 km/h)52.04 mph (83.75 km/h)
55 mph (88.51 km/h)57.24 mph (92.12 km/h)
60 mph (96.56 km/h)62.44 mph (100.49 km/h)
65 mph (104.61 km/h)67.65 mph (108.87 km/h)
70 mph (112.65 km/h)72.85 mph (117.24 km/h)
75 mph (120.7 km/h)78.05 mph (125.62 km/h)
80 mph (128.75 km/h)83.26 mph (133.99 km/h)
85 mph (136.79 km/h)88.46 mph (142.37 km/h)
90 mph (144.84 km/h)93.67 mph (150.74 km/h)
95 mph (152.89 km/h)98.87 mph (159.12 km/h)
100 mph (160.93 km/h)104.07 mph (167.49 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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