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 255/65r19 Tire Comparison Side By Side
  265/55-19 255/65-19 Difference
Diameter inches (mm) 30.48 (774.1) 32.05 (814.1) 1.57 (40) 5.2%
Width inches (mm) 10.43 (265) 10.04 (255) -0.39 (-10) -3.8%
Circum. inches (mm) 95.74 (2431.91) 100.69 (2557.57) 4.95 (125.66) 5.2%
Sidewall Height inches (mm) 5.74 (145.75) 6.53 (165.75) 0.79 (20) 13.7%
Revolutions per mile (km) 661.76 (411.2) 629.25 (391) -32.52 (-20.2) -4.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.03 mph (33.85 km/h)
25 mph (40.23 km/h)26.29 mph (42.31 km/h)
30 mph (48.28 km/h)31.55 mph (50.78 km/h)
35 mph (56.33 km/h)36.81 mph (59.24 km/h)
40 mph (64.37 km/h)42.07 mph (67.7 km/h)
45 mph (72.42 km/h)47.33 mph (76.16 km/h)
50 mph (80.47 km/h)52.58 mph (84.63 km/h)
55 mph (88.51 km/h)57.84 mph (93.09 km/h)
60 mph (96.56 km/h)63.1 mph (101.55 km/h)
65 mph (104.61 km/h)68.36 mph (110.01 km/h)
70 mph (112.65 km/h)73.62 mph (118.48 km/h)
75 mph (120.7 km/h)78.88 mph (126.94 km/h)
80 mph (128.75 km/h)84.13 mph (135.4 km/h)
85 mph (136.79 km/h)89.39 mph (143.86 km/h)
90 mph (144.84 km/h)94.65 mph (152.33 km/h)
95 mph (152.89 km/h)99.91 mph (160.79 km/h)
100 mph (160.93 km/h)105.17 mph (169.25 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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