Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/30r19 vs 275/30r19 Tire Comparison Side By Side
  265/30-19 275/30-19 Difference
Diameter inches (mm) 25.26 (641.6) 25.5 (647.6) 0.24 (6) 0.9%
Width inches (mm) 10.43 (265) 10.83 (275) 0.39 (10) 3.8%
Circum. inches (mm) 79.36 (2015.65) 80.1 (2034.5) 0.74 (18.85) 0.9%
Sidewall Height inches (mm) 3.13 (79.5) 3.25 (82.5) 0.12 (3) 3.8%
Revolutions per mile (km) 798.43 (496.12) 791.03 (491.52) -7.4 (-4.6) -0.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.19 mph (32.49 km/h)
25 mph (40.23 km/h)25.23 mph (40.61 km/h)
30 mph (48.28 km/h)30.28 mph (48.73 km/h)
35 mph (56.33 km/h)35.33 mph (56.85 km/h)
40 mph (64.37 km/h)40.37 mph (64.98 km/h)
45 mph (72.42 km/h)45.42 mph (73.1 km/h)
50 mph (80.47 km/h)50.47 mph (81.22 km/h)
55 mph (88.51 km/h)55.51 mph (89.34 km/h)
60 mph (96.56 km/h)60.56 mph (97.46 km/h)
65 mph (104.61 km/h)65.61 mph (105.59 km/h)
70 mph (112.65 km/h)70.65 mph (113.71 km/h)
75 mph (120.7 km/h)75.7 mph (121.83 km/h)
80 mph (128.75 km/h)80.75 mph (129.95 km/h)
85 mph (136.79 km/h)85.79 mph (138.07 km/h)
90 mph (144.84 km/h)90.84 mph (146.2 km/h)
95 mph (152.89 km/h)95.89 mph (154.32 km/h)
100 mph (160.93 km/h)100.94 mph (162.44 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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