Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/50r19 vs 235/65r19 Tire Comparison Side By Side
  245/50-19 235/65-19 Difference
Diameter inches (mm) 28.65 (727.6) 31.03 (788.1) 2.38 (60.5) 8.3%
Width inches (mm) 9.65 (245) 9.25 (235) -0.39 (-10) -4.1%
Circum. inches (mm) 89.99 (2285.82) 97.48 (2475.89) 7.48 (190.07) 8.3%
Sidewall Height inches (mm) 4.82 (122.5) 6.01 (152.75) 1.19 (30.25) 24.7%
Revolutions per mile (km) 704.05 (437.48) 650.01 (403.89) -54.05 (-33.58) -7.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.66 mph (34.86 km/h)
25 mph (40.23 km/h)27.08 mph (43.58 km/h)
30 mph (48.28 km/h)32.49 mph (52.29 km/h)
35 mph (56.33 km/h)37.91 mph (61.01 km/h)
40 mph (64.37 km/h)43.33 mph (69.73 km/h)
45 mph (72.42 km/h)48.74 mph (78.44 km/h)
50 mph (80.47 km/h)54.16 mph (87.16 km/h)
55 mph (88.51 km/h)59.57 mph (95.87 km/h)
60 mph (96.56 km/h)64.99 mph (104.59 km/h)
65 mph (104.61 km/h)70.4 mph (113.31 km/h)
70 mph (112.65 km/h)75.82 mph (122.02 km/h)
75 mph (120.7 km/h)81.24 mph (130.74 km/h)
80 mph (128.75 km/h)86.65 mph (139.45 km/h)
85 mph (136.79 km/h)92.07 mph (148.17 km/h)
90 mph (144.84 km/h)97.48 mph (156.88 km/h)
95 mph (152.89 km/h)102.9 mph (165.6 km/h)
100 mph (160.93 km/h)108.32 mph (174.32 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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