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 245/35r19 Tire Comparison Side By Side
  265/30-19 245/35-19 Difference
Diameter inches (mm) 25.26 (641.6) 25.75 (654.1) 0.49 (12.5) 1.9%
Width inches (mm) 10.43 (265) 9.65 (245) -0.79 (-20) -7.5%
Circum. inches (mm) 79.36 (2015.65) 80.9 (2054.92) 1.55 (39.27) 1.9%
Sidewall Height inches (mm) 3.13 (79.5) 3.38 (85.75) 0.25 (6.25) 7.9%
Revolutions per mile (km) 798.43 (496.12) 783.17 (486.64) -15.26 (-9.48) -1.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.39 mph (32.81 km/h)
25 mph (40.23 km/h)25.49 mph (41.02 km/h)
30 mph (48.28 km/h)30.58 mph (49.22 km/h)
35 mph (56.33 km/h)35.68 mph (57.42 km/h)
40 mph (64.37 km/h)40.78 mph (65.63 km/h)
45 mph (72.42 km/h)45.88 mph (73.83 km/h)
50 mph (80.47 km/h)50.97 mph (82.04 km/h)
55 mph (88.51 km/h)56.07 mph (90.24 km/h)
60 mph (96.56 km/h)61.17 mph (98.44 km/h)
65 mph (104.61 km/h)66.27 mph (106.65 km/h)
70 mph (112.65 km/h)71.36 mph (114.85 km/h)
75 mph (120.7 km/h)76.46 mph (123.05 km/h)
80 mph (128.75 km/h)81.56 mph (131.26 km/h)
85 mph (136.79 km/h)86.66 mph (139.46 km/h)
90 mph (144.84 km/h)91.75 mph (147.66 km/h)
95 mph (152.89 km/h)96.85 mph (155.87 km/h)
100 mph (160.93 km/h)101.95 mph (164.07 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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