Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
165/55r16 vs 215/35r18 Tire Comparison Side By Side
  165/55-16 215/35-18 Difference
Diameter inches (mm) 23.15 (587.9) 23.93 (607.7) 0.78 (19.8) 3.4%
Width inches (mm) 6.5 (165) 8.46 (215) 1.97 (50) 30.3%
Circum. inches (mm) 72.71 (1846.94) 75.16 (1909.15) 2.45 (62.2) 3.4%
Sidewall Height inches (mm) 3.57 (90.75) 2.96 (75.25) -0.61 (-15.5) -17.1%
Revolutions per mile (km) 871.36 (541.43) 842.97 (523.79) -28.39 (-17.64) -3.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.67 mph (33.27 km/h)
25 mph (40.23 km/h)25.84 mph (41.59 km/h)
30 mph (48.28 km/h)31.01 mph (49.91 km/h)
35 mph (56.33 km/h)36.18 mph (58.22 km/h)
40 mph (64.37 km/h)41.35 mph (66.54 km/h)
45 mph (72.42 km/h)46.52 mph (74.86 km/h)
50 mph (80.47 km/h)51.68 mph (83.18 km/h)
55 mph (88.51 km/h)56.85 mph (91.5 km/h)
60 mph (96.56 km/h)62.02 mph (99.81 km/h)
65 mph (104.61 km/h)67.19 mph (108.13 km/h)
70 mph (112.65 km/h)72.36 mph (116.45 km/h)
75 mph (120.7 km/h)77.53 mph (124.77 km/h)
80 mph (128.75 km/h)82.69 mph (133.08 km/h)
85 mph (136.79 km/h)87.86 mph (141.4 km/h)
90 mph (144.84 km/h)93.03 mph (149.72 km/h)
95 mph (152.89 km/h)98.2 mph (158.04 km/h)
100 mph (160.93 km/h)103.37 mph (166.35 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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