Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/55r19 vs 255/65r19 Tire Comparison Side By Side
  275/55-19 255/65-19 Difference
Diameter inches (mm) 30.91 (785.1) 32.05 (814.1) 1.14 (29) 3.7%
Width inches (mm) 10.83 (275) 10.04 (255) -0.79 (-20) -7.3%
Circum. inches (mm) 97.1 (2466.46) 100.69 (2557.57) 3.59 (91.11) 3.7%
Sidewall Height inches (mm) 5.95 (151.25) 6.53 (165.75) 0.57 (14.5) 9.6%
Revolutions per mile (km) 652.49 (405.44) 629.25 (391) -23.24 (-14.44) -3.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.74 mph (33.38 km/h)
25 mph (40.23 km/h)25.92 mph (41.72 km/h)
30 mph (48.28 km/h)31.11 mph (50.06 km/h)
35 mph (56.33 km/h)36.29 mph (58.41 km/h)
40 mph (64.37 km/h)41.48 mph (66.75 km/h)
45 mph (72.42 km/h)46.66 mph (75.1 km/h)
50 mph (80.47 km/h)51.85 mph (83.44 km/h)
55 mph (88.51 km/h)57.03 mph (91.78 km/h)
60 mph (96.56 km/h)62.22 mph (100.13 km/h)
65 mph (104.61 km/h)67.4 mph (108.47 km/h)
70 mph (112.65 km/h)72.59 mph (116.82 km/h)
75 mph (120.7 km/h)77.77 mph (125.16 km/h)
80 mph (128.75 km/h)82.96 mph (133.5 km/h)
85 mph (136.79 km/h)88.14 mph (141.85 km/h)
90 mph (144.84 km/h)93.32 mph (150.19 km/h)
95 mph (152.89 km/h)98.51 mph (158.54 km/h)
100 mph (160.93 km/h)103.69 mph (166.88 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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