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 205/55r17 Tire Comparison Side By Side
  165/55-16 205/55-17 Difference
Diameter inches (mm) 23.15 (587.9) 25.88 (657.3) 2.73 (69.4) 11.8%
Width inches (mm) 6.5 (165) 8.07 (205) 1.57 (40) 24.2%
Circum. inches (mm) 72.71 (1846.94) 81.3 (2064.97) 8.58 (218.03) 11.8%
Sidewall Height inches (mm) 3.57 (90.75) 4.44 (112.75) 0.87 (22) 24.2%
Revolutions per mile (km) 871.36 (541.43) 779.36 (484.27) -92 (-57.17) -10.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.36 mph (35.99 km/h)
25 mph (40.23 km/h)27.95 mph (44.98 km/h)
30 mph (48.28 km/h)33.54 mph (53.98 km/h)
35 mph (56.33 km/h)39.13 mph (62.98 km/h)
40 mph (64.37 km/h)44.72 mph (71.97 km/h)
45 mph (72.42 km/h)50.31 mph (80.97 km/h)
50 mph (80.47 km/h)55.9 mph (89.97 km/h)
55 mph (88.51 km/h)61.49 mph (98.96 km/h)
60 mph (96.56 km/h)67.08 mph (107.96 km/h)
65 mph (104.61 km/h)72.67 mph (116.96 km/h)
70 mph (112.65 km/h)78.26 mph (125.95 km/h)
75 mph (120.7 km/h)83.85 mph (134.95 km/h)
80 mph (128.75 km/h)89.44 mph (143.95 km/h)
85 mph (136.79 km/h)95.03 mph (152.94 km/h)
90 mph (144.84 km/h)100.62 mph (161.94 km/h)
95 mph (152.89 km/h)106.21 mph (170.94 km/h)
100 mph (160.93 km/h)111.8 mph (179.93 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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