Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
175/60r19 vs 155/70r19 Tire Comparison Side By Side
  175/60-19 155/70-19 Difference
Diameter inches (mm) 27.27 (692.6) 27.54 (699.6) 0.28 (7) 1%
Width inches (mm) 6.89 (175) 6.1 (155) -0.79 (-20) -11.4%
Circum. inches (mm) 85.66 (2175.87) 86.53 (2197.86) 0.87 (21.99) 1%
Sidewall Height inches (mm) 4.13 (105) 4.27 (108.5) 0.14 (3.5) 3.3%
Revolutions per mile (km) 739.63 (459.59) 732.23 (454.99) -7.4 (-4.6) -1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.2 mph (32.51 km/h)
25 mph (40.23 km/h)25.25 mph (40.64 km/h)
30 mph (48.28 km/h)30.3 mph (48.77 km/h)
35 mph (56.33 km/h)35.35 mph (56.9 km/h)
40 mph (64.37 km/h)40.4 mph (65.02 km/h)
45 mph (72.42 km/h)45.45 mph (73.15 km/h)
50 mph (80.47 km/h)50.51 mph (81.28 km/h)
55 mph (88.51 km/h)55.56 mph (89.41 km/h)
60 mph (96.56 km/h)60.61 mph (97.54 km/h)
65 mph (104.61 km/h)65.66 mph (105.66 km/h)
70 mph (112.65 km/h)70.71 mph (113.79 km/h)
75 mph (120.7 km/h)75.76 mph (121.92 km/h)
80 mph (128.75 km/h)80.81 mph (130.05 km/h)
85 mph (136.79 km/h)85.86 mph (138.18 km/h)
90 mph (144.84 km/h)90.91 mph (146.31 km/h)
95 mph (152.89 km/h)95.96 mph (154.43 km/h)
100 mph (160.93 km/h)101.01 mph (162.56 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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