Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/35r19 vs 235/55r19 Tire Comparison Side By Side
  255/35-19 235/55-19 Difference
Diameter inches (mm) 26.03 (661.1) 29.18 (741.1) 3.15 (80) 12.1%
Width inches (mm) 10.04 (255) 9.25 (235) -0.79 (-20) -7.8%
Circum. inches (mm) 81.77 (2076.91) 91.66 (2328.23) 9.89 (251.33) 12.1%
Sidewall Height inches (mm) 3.51 (89.25) 5.09 (129.25) 1.57 (40) 44.8%
Revolutions per mile (km) 774.88 (481.48) 691.23 (429.51) -83.65 (-51.98) -10.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.42 mph (36.08 km/h)
25 mph (40.23 km/h)28.03 mph (45.1 km/h)
30 mph (48.28 km/h)33.63 mph (54.12 km/h)
35 mph (56.33 km/h)39.24 mph (63.14 km/h)
40 mph (64.37 km/h)44.84 mph (72.16 km/h)
45 mph (72.42 km/h)50.45 mph (81.18 km/h)
50 mph (80.47 km/h)56.05 mph (90.2 km/h)
55 mph (88.51 km/h)61.66 mph (99.23 km/h)
60 mph (96.56 km/h)67.26 mph (108.25 km/h)
65 mph (104.61 km/h)72.87 mph (117.27 km/h)
70 mph (112.65 km/h)78.47 mph (126.29 km/h)
75 mph (120.7 km/h)84.08 mph (135.31 km/h)
80 mph (128.75 km/h)89.68 mph (144.33 km/h)
85 mph (136.79 km/h)95.29 mph (153.35 km/h)
90 mph (144.84 km/h)100.89 mph (162.37 km/h)
95 mph (152.89 km/h)106.5 mph (171.39 km/h)
100 mph (160.93 km/h)112.1 mph (180.41 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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