Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/70r19.5 vs 235/85r16 Tire Comparison Side By Side
  245/70-19.5 235/85-16 Difference
Diameter inches (mm) 33 (838.3) 31.73 (805.9) -1.28 (-32.4) -3.9%
Width inches (mm) 9.65 (245) 9.25 (235) -0.39 (-10) -4.1%
Circum. inches (mm) 103.68 (2633.6) 99.68 (2531.81) -4.01 (-101.79) -3.9%
Sidewall Height inches (mm) 6.75 (171.5) 7.86 (199.75) 1.11 (28.25) 16.5%
Revolutions per mile (km) 611.08 (379.71) 635.65 (394.97) 24.57 (15.27) 4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.23 mph (30.94 km/h)
25 mph (40.23 km/h)24.03 mph (38.68 km/h)
30 mph (48.28 km/h)28.84 mph (46.41 km/h)
35 mph (56.33 km/h)33.65 mph (54.15 km/h)
40 mph (64.37 km/h)38.45 mph (61.89 km/h)
45 mph (72.42 km/h)43.26 mph (69.62 km/h)
50 mph (80.47 km/h)48.07 mph (77.36 km/h)
55 mph (88.51 km/h)52.87 mph (85.09 km/h)
60 mph (96.56 km/h)57.68 mph (92.83 km/h)
65 mph (104.61 km/h)62.49 mph (100.56 km/h)
70 mph (112.65 km/h)67.29 mph (108.3 km/h)
75 mph (120.7 km/h)72.1 mph (116.04 km/h)
80 mph (128.75 km/h)76.91 mph (123.77 km/h)
85 mph (136.79 km/h)81.71 mph (131.51 km/h)
90 mph (144.84 km/h)86.52 mph (139.24 km/h)
95 mph (152.89 km/h)91.33 mph (146.98 km/h)
100 mph (160.93 km/h)96.14 mph (154.71 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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