Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
155/80r19 vs 255/35r19 Tire Comparison Side By Side
  155/80-19 255/35-19 Difference
Diameter inches (mm) 28.76 (730.6) 26.03 (661.1) -2.74 (-69.5) -9.5%
Width inches (mm) 6.1 (155) 10.04 (255) 3.94 (100) 64.5%
Circum. inches (mm) 90.36 (2295.25) 81.77 (2076.91) -8.6 (-218.34) -9.5%
Sidewall Height inches (mm) 4.88 (124) 3.51 (89.25) -1.37 (-34.75) -28%
Revolutions per mile (km) 701.16 (435.68) 774.88 (481.48) 73.71 (45.8) 10.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.1 mph (29.13 km/h)
25 mph (40.23 km/h)22.62 mph (36.41 km/h)
30 mph (48.28 km/h)27.15 mph (43.69 km/h)
35 mph (56.33 km/h)31.67 mph (50.97 km/h)
40 mph (64.37 km/h)36.19 mph (58.25 km/h)
45 mph (72.42 km/h)40.72 mph (65.53 km/h)
50 mph (80.47 km/h)45.24 mph (72.81 km/h)
55 mph (88.51 km/h)49.77 mph (80.09 km/h)
60 mph (96.56 km/h)54.29 mph (87.38 km/h)
65 mph (104.61 km/h)58.82 mph (94.66 km/h)
70 mph (112.65 km/h)63.34 mph (101.94 km/h)
75 mph (120.7 km/h)67.87 mph (109.22 km/h)
80 mph (128.75 km/h)72.39 mph (116.5 km/h)
85 mph (136.79 km/h)76.91 mph (123.78 km/h)
90 mph (144.84 km/h)81.44 mph (131.06 km/h)
95 mph (152.89 km/h)85.96 mph (138.34 km/h)
100 mph (160.93 km/h)90.49 mph (145.63 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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