Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
240/55r16 vs 240/30r19 Tire Comparison Side By Side
  240/55-16 240/30-19 Difference
Diameter inches (mm) 26.39 (670.4) 24.67 (626.6) -1.72 (-43.8) -6.5%
Width inches (mm) 9.45 (240) 9.45 (240) 0 (0) 0%
Circum. inches (mm) 82.92 (2106.12) 77.5 (1968.52) -5.42 (-137.6) -6.5%
Sidewall Height inches (mm) 5.2 (132) 2.83 (72) -2.36 (-60) -45.5%
Revolutions per mile (km) 764.13 (474.81) 817.54 (507.99) 53.41 (33.19) 7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.69 mph (30.08 km/h)
25 mph (40.23 km/h)23.37 mph (37.61 km/h)
30 mph (48.28 km/h)28.04 mph (45.13 km/h)
35 mph (56.33 km/h)32.71 mph (52.65 km/h)
40 mph (64.37 km/h)37.39 mph (60.17 km/h)
45 mph (72.42 km/h)42.06 mph (67.69 km/h)
50 mph (80.47 km/h)46.73 mph (75.21 km/h)
55 mph (88.51 km/h)51.41 mph (82.73 km/h)
60 mph (96.56 km/h)56.08 mph (90.25 km/h)
65 mph (104.61 km/h)60.75 mph (97.77 km/h)
70 mph (112.65 km/h)65.43 mph (105.29 km/h)
75 mph (120.7 km/h)70.1 mph (112.82 km/h)
80 mph (128.75 km/h)74.77 mph (120.34 km/h)
85 mph (136.79 km/h)79.45 mph (127.86 km/h)
90 mph (144.84 km/h)84.12 mph (135.38 km/h)
95 mph (152.89 km/h)88.79 mph (142.9 km/h)
100 mph (160.93 km/h)93.47 mph (150.42 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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