Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/35r19 vs 275/35r19 Tire Comparison Side By Side
  255/35-19 275/35-19 Difference
Diameter inches (mm) 26.03 (661.1) 26.58 (675.1) 0.55 (14) 2.1%
Width inches (mm) 10.04 (255) 10.83 (275) 0.79 (20) 7.8%
Circum. inches (mm) 81.77 (2076.91) 83.5 (2120.89) 1.73 (43.98) 2.1%
Sidewall Height inches (mm) 3.51 (89.25) 3.79 (96.25) 0.28 (7) 7.8%
Revolutions per mile (km) 774.88 (481.48) 758.81 (471.5) -16.07 (-9.98) -2.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.42 mph (32.87 km/h)
25 mph (40.23 km/h)25.53 mph (41.09 km/h)
30 mph (48.28 km/h)30.64 mph (49.3 km/h)
35 mph (56.33 km/h)35.74 mph (57.52 km/h)
40 mph (64.37 km/h)40.85 mph (65.74 km/h)
45 mph (72.42 km/h)45.95 mph (73.95 km/h)
50 mph (80.47 km/h)51.06 mph (82.17 km/h)
55 mph (88.51 km/h)56.16 mph (90.39 km/h)
60 mph (96.56 km/h)61.27 mph (98.61 km/h)
65 mph (104.61 km/h)66.38 mph (106.82 km/h)
70 mph (112.65 km/h)71.48 mph (115.04 km/h)
75 mph (120.7 km/h)76.59 mph (123.26 km/h)
80 mph (128.75 km/h)81.69 mph (131.47 km/h)
85 mph (136.79 km/h)86.8 mph (139.69 km/h)
90 mph (144.84 km/h)91.91 mph (147.91 km/h)
95 mph (152.89 km/h)97.01 mph (156.13 km/h)
100 mph (160.93 km/h)102.12 mph (164.34 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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