Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/35r18 vs 275/35r18 Tire Comparison Side By Side
  265/35-18 275/35-18 Difference
Diameter inches (mm) 25.3 (642.7) 25.58 (649.7) 0.28 (7) 1.1%
Width inches (mm) 10.43 (265) 10.83 (275) 0.39 (10) 3.8%
Circum. inches (mm) 79.49 (2019.1) 80.36 (2041.09) 0.87 (21.99) 1.1%
Sidewall Height inches (mm) 3.65 (92.75) 3.79 (96.25) 0.14 (3.5) 3.8%
Revolutions per mile (km) 797.06 (495.27) 788.47 (489.93) -8.59 (-5.34) -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)30.33 mph (48.81 km/h)
35 mph (56.33 km/h)35.38 mph (56.94 km/h)
40 mph (64.37 km/h)40.44 mph (65.08 km/h)
45 mph (72.42 km/h)45.49 mph (73.21 km/h)
50 mph (80.47 km/h)50.54 mph (81.34 km/h)
55 mph (88.51 km/h)55.6 mph (89.48 km/h)
60 mph (96.56 km/h)60.65 mph (97.61 km/h)
65 mph (104.61 km/h)65.71 mph (105.75 km/h)
70 mph (112.65 km/h)70.76 mph (113.88 km/h)
75 mph (120.7 km/h)75.82 mph (122.02 km/h)
80 mph (128.75 km/h)80.87 mph (130.15 km/h)
85 mph (136.79 km/h)85.93 mph (138.28 km/h)
90 mph (144.84 km/h)90.98 mph (146.42 km/h)
95 mph (152.89 km/h)96.03 mph (154.55 km/h)
100 mph (160.93 km/h)101.09 mph (162.69 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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