Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/55r19 vs 245/55r19 Tire Comparison Side By Side
  265/55-19 245/55-19 Difference
Diameter inches (mm) 30.48 (774.1) 29.61 (752.1) -0.87 (-22) -2.8%
Width inches (mm) 10.43 (265) 9.65 (245) -0.79 (-20) -7.5%
Circum. inches (mm) 95.74 (2431.91) 93.02 (2362.79) -2.72 (-69.12) -2.8%
Sidewall Height inches (mm) 5.74 (145.75) 5.31 (134.75) -0.43 (-11) -7.5%
Revolutions per mile (km) 661.76 (411.2) 681.12 (423.23) 19.36 (12.03) 2.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.43 mph (31.27 km/h)
25 mph (40.23 km/h)24.29 mph (39.09 km/h)
30 mph (48.28 km/h)29.15 mph (46.91 km/h)
35 mph (56.33 km/h)34.01 mph (54.73 km/h)
40 mph (64.37 km/h)38.86 mph (62.54 km/h)
45 mph (72.42 km/h)43.72 mph (70.36 km/h)
50 mph (80.47 km/h)48.58 mph (78.18 km/h)
55 mph (88.51 km/h)53.44 mph (86 km/h)
60 mph (96.56 km/h)58.29 mph (93.82 km/h)
65 mph (104.61 km/h)63.15 mph (101.63 km/h)
70 mph (112.65 km/h)68.01 mph (109.45 km/h)
75 mph (120.7 km/h)72.87 mph (117.27 km/h)
80 mph (128.75 km/h)77.73 mph (125.09 km/h)
85 mph (136.79 km/h)82.58 mph (132.91 km/h)
90 mph (144.84 km/h)87.44 mph (140.72 km/h)
95 mph (152.89 km/h)92.3 mph (148.54 km/h)
100 mph (160.93 km/h)97.16 mph (156.36 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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