Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/35r19 vs 245/35r19 Tire Comparison Side By Side
  235/35-19 245/35-19 Difference
Diameter inches (mm) 25.48 (647.1) 25.75 (654.1) 0.28 (7) 1.1%
Width inches (mm) 9.25 (235) 9.65 (245) 0.39 (10) 4.3%
Circum. inches (mm) 80.04 (2032.92) 80.9 (2054.92) 0.87 (21.99) 1.1%
Sidewall Height inches (mm) 3.24 (82.25) 3.38 (85.75) 0.14 (3.5) 4.3%
Revolutions per mile (km) 791.64 (491.9) 783.17 (486.64) -8.47 (-5.26) -1.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.22 mph (32.54 km/h)
25 mph (40.23 km/h)25.27 mph (40.67 km/h)
30 mph (48.28 km/h)30.32 mph (48.8 km/h)
35 mph (56.33 km/h)35.38 mph (56.94 km/h)
40 mph (64.37 km/h)40.43 mph (65.07 km/h)
45 mph (72.42 km/h)45.49 mph (73.2 km/h)
50 mph (80.47 km/h)50.54 mph (81.34 km/h)
55 mph (88.51 km/h)55.59 mph (89.47 km/h)
60 mph (96.56 km/h)60.65 mph (97.61 km/h)
65 mph (104.61 km/h)65.7 mph (105.74 km/h)
70 mph (112.65 km/h)70.76 mph (113.87 km/h)
75 mph (120.7 km/h)75.81 mph (122.01 km/h)
80 mph (128.75 km/h)80.87 mph (130.14 km/h)
85 mph (136.79 km/h)85.92 mph (138.27 km/h)
90 mph (144.84 km/h)90.97 mph (146.41 km/h)
95 mph (152.89 km/h)96.03 mph (154.54 km/h)
100 mph (160.93 km/h)101.08 mph (162.68 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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