Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/55r19 vs 275/55r19 Tire Comparison Side By Side
  255/55-19 275/55-19 Difference
Diameter inches (mm) 30.04 (763.1) 30.91 (785.1) 0.87 (22) 2.9%
Width inches (mm) 10.04 (255) 10.83 (275) 0.79 (20) 7.8%
Circum. inches (mm) 94.38 (2397.35) 97.1 (2466.46) 2.72 (69.12) 2.9%
Sidewall Height inches (mm) 5.52 (140.25) 5.95 (151.25) 0.43 (11) 7.8%
Revolutions per mile (km) 671.3 (417.13) 652.49 (405.44) -18.81 (-11.69) -2.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.58 mph (33.11 km/h)
25 mph (40.23 km/h)25.72 mph (41.39 km/h)
30 mph (48.28 km/h)30.86 mph (49.67 km/h)
35 mph (56.33 km/h)36.01 mph (57.95 km/h)
40 mph (64.37 km/h)41.15 mph (66.23 km/h)
45 mph (72.42 km/h)46.3 mph (74.51 km/h)
50 mph (80.47 km/h)51.44 mph (82.79 km/h)
55 mph (88.51 km/h)56.59 mph (91.07 km/h)
60 mph (96.56 km/h)61.73 mph (99.34 km/h)
65 mph (104.61 km/h)66.87 mph (107.62 km/h)
70 mph (112.65 km/h)72.02 mph (115.9 km/h)
75 mph (120.7 km/h)77.16 mph (124.18 km/h)
80 mph (128.75 km/h)82.31 mph (132.46 km/h)
85 mph (136.79 km/h)87.45 mph (140.74 km/h)
90 mph (144.84 km/h)92.59 mph (149.02 km/h)
95 mph (152.89 km/h)97.74 mph (157.3 km/h)
100 mph (160.93 km/h)102.88 mph (165.57 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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