Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
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295/45r19 vs 245/50r19 Tire Comparison Side By Side
  295/45-19 245/50-19 Difference
Diameter inches (mm) 29.45 (748.1) 28.65 (727.6) -0.81 (-20.5) -2.7%
Width inches (mm) 11.61 (295) 9.65 (245) -1.97 (-50) -16.9%
Circum. inches (mm) 92.53 (2350.23) 89.99 (2285.82) -2.54 (-64.4) -2.7%
Sidewall Height inches (mm) 5.23 (132.75) 4.82 (122.5) -0.4 (-10.25) -7.7%
Revolutions per mile (km) 684.76 (425.49) 704.05 (437.48) 19.29 (11.99) 2.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.45 mph (31.3 km/h)
25 mph (40.23 km/h)24.31 mph (39.13 km/h)
30 mph (48.28 km/h)29.18 mph (46.96 km/h)
35 mph (56.33 km/h)34.04 mph (54.78 km/h)
40 mph (64.37 km/h)38.9 mph (62.61 km/h)
45 mph (72.42 km/h)43.77 mph (70.44 km/h)
50 mph (80.47 km/h)48.63 mph (78.26 km/h)
55 mph (88.51 km/h)53.49 mph (86.09 km/h)
60 mph (96.56 km/h)58.36 mph (93.91 km/h)
65 mph (104.61 km/h)63.22 mph (101.74 km/h)
70 mph (112.65 km/h)68.08 mph (109.57 km/h)
75 mph (120.7 km/h)72.94 mph (117.39 km/h)
80 mph (128.75 km/h)77.81 mph (125.22 km/h)
85 mph (136.79 km/h)82.67 mph (133.05 km/h)
90 mph (144.84 km/h)87.53 mph (140.87 km/h)
95 mph (152.89 km/h)92.4 mph (148.7 km/h)
100 mph (160.93 km/h)97.26 mph (156.52 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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