Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/55r19 vs 255/35r19 Tire Comparison Side By Side
  235/55-19 255/35-19 Difference
Diameter inches (mm) 29.18 (741.1) 26.03 (661.1) -3.15 (-80) -10.8%
Width inches (mm) 9.25 (235) 10.04 (255) 0.79 (20) 8.5%
Circum. inches (mm) 91.66 (2328.23) 81.77 (2076.91) -9.89 (-251.33) -10.8%
Sidewall Height inches (mm) 5.09 (129.25) 3.51 (89.25) -1.57 (-40) -30.9%
Revolutions per mile (km) 691.23 (429.51) 774.88 (481.48) 83.65 (51.98) 12.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.84 mph (28.71 km/h)
25 mph (40.23 km/h)22.3 mph (35.89 km/h)
30 mph (48.28 km/h)26.76 mph (43.07 km/h)
35 mph (56.33 km/h)31.22 mph (50.25 km/h)
40 mph (64.37 km/h)35.68 mph (57.42 km/h)
45 mph (72.42 km/h)40.14 mph (64.6 km/h)
50 mph (80.47 km/h)44.6 mph (71.78 km/h)
55 mph (88.51 km/h)49.06 mph (78.96 km/h)
60 mph (96.56 km/h)53.52 mph (86.14 km/h)
65 mph (104.61 km/h)57.98 mph (93.32 km/h)
70 mph (112.65 km/h)62.44 mph (100.49 km/h)
75 mph (120.7 km/h)66.9 mph (107.67 km/h)
80 mph (128.75 km/h)71.36 mph (114.85 km/h)
85 mph (136.79 km/h)75.82 mph (122.03 km/h)
90 mph (144.84 km/h)80.28 mph (129.21 km/h)
95 mph (152.89 km/h)84.74 mph (136.38 km/h)
100 mph (160.93 km/h)89.21 mph (143.56 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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