Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
165/82r15 vs 195/55r15 Tire Comparison Side By Side
  165/82-15 195/55-15 Difference
Diameter inches (mm) 25.65 (651.6) 23.44 (595.5) -2.21 (-56.1) -8.6%
Width inches (mm) 6.5 (165) 7.68 (195) 1.18 (30) 18.2%
Circum. inches (mm) 80.59 (2047.06) 73.65 (1870.82) -6.94 (-176.24) -8.6%
Sidewall Height inches (mm) 5.33 (135.3) 4.22 (107.25) -1.1 (-28.05) -20.7%
Revolutions per mile (km) 786.17 (488.5) 860.24 (534.52) 74.06 (46.02) 9.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.28 mph (29.42 km/h)
25 mph (40.23 km/h)22.85 mph (36.77 km/h)
30 mph (48.28 km/h)27.42 mph (44.12 km/h)
35 mph (56.33 km/h)31.99 mph (51.48 km/h)
40 mph (64.37 km/h)36.56 mph (58.83 km/h)
45 mph (72.42 km/h)41.13 mph (66.19 km/h)
50 mph (80.47 km/h)45.7 mph (73.54 km/h)
55 mph (88.51 km/h)50.26 mph (80.89 km/h)
60 mph (96.56 km/h)54.83 mph (88.25 km/h)
65 mph (104.61 km/h)59.4 mph (95.6 km/h)
70 mph (112.65 km/h)63.97 mph (102.96 km/h)
75 mph (120.7 km/h)68.54 mph (110.31 km/h)
80 mph (128.75 km/h)73.11 mph (117.66 km/h)
85 mph (136.79 km/h)77.68 mph (125.02 km/h)
90 mph (144.84 km/h)82.25 mph (132.37 km/h)
95 mph (152.89 km/h)86.82 mph (139.72 km/h)
100 mph (160.93 km/h)91.39 mph (147.08 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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