Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/35r16 vs 235/85r16 Tire Comparison Side By Side
  245/35-16 235/85-16 Difference
Diameter inches (mm) 22.75 (577.9) 31.73 (805.9) 8.98 (228) 39.5%
Width inches (mm) 9.65 (245) 9.25 (235) -0.39 (-10) -4.1%
Circum. inches (mm) 71.48 (1815.53) 99.68 (2531.81) 28.2 (716.28) 39.5%
Sidewall Height inches (mm) 3.38 (85.75) 7.86 (199.75) 4.49 (114) 132.9%
Revolutions per mile (km) 886.43 (550.8) 635.65 (394.97) -250.78 (-155.83) -28.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)27.89 mph (44.89 km/h)
25 mph (40.23 km/h)34.86 mph (56.11 km/h)
30 mph (48.28 km/h)41.84 mph (67.33 km/h)
35 mph (56.33 km/h)48.81 mph (78.55 km/h)
40 mph (64.37 km/h)55.78 mph (89.77 km/h)
45 mph (72.42 km/h)62.75 mph (100.99 km/h)
50 mph (80.47 km/h)69.73 mph (112.21 km/h)
55 mph (88.51 km/h)76.7 mph (123.44 km/h)
60 mph (96.56 km/h)83.67 mph (134.66 km/h)
65 mph (104.61 km/h)90.64 mph (145.88 km/h)
70 mph (112.65 km/h)97.62 mph (157.1 km/h)
75 mph (120.7 km/h)104.59 mph (168.32 km/h)
80 mph (128.75 km/h)111.56 mph (179.54 km/h)
85 mph (136.79 km/h)118.54 mph (190.76 km/h)
90 mph (144.84 km/h)125.51 mph (201.99 km/h)
95 mph (152.89 km/h)132.48 mph (213.21 km/h)
100 mph (160.93 km/h)139.45 mph (224.43 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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