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 165/65r10 Tire Comparison Side By Side
  165/82-15 165/65-10 Difference
Diameter inches (mm) 25.65 (651.6) 18.44 (468.5) -7.21 (-183.1) -28.1%
Width inches (mm) 6.5 (165) 6.5 (165) 0 (0) 0%
Circum. inches (mm) 80.59 (2047.06) 57.95 (1471.84) -22.65 (-575.23) -28.1%
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) 1093.43 (679.42) 307.25 (190.92) 39.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)14.38 mph (23.14 km/h)
25 mph (40.23 km/h)17.97 mph (28.93 km/h)
30 mph (48.28 km/h)21.57 mph (34.71 km/h)
35 mph (56.33 km/h)25.16 mph (40.5 km/h)
40 mph (64.37 km/h)28.76 mph (46.28 km/h)
45 mph (72.42 km/h)32.35 mph (52.07 km/h)
50 mph (80.47 km/h)35.95 mph (57.86 km/h)
55 mph (88.51 km/h)39.54 mph (63.64 km/h)
60 mph (96.56 km/h)43.14 mph (69.43 km/h)
65 mph (104.61 km/h)46.73 mph (75.21 km/h)
70 mph (112.65 km/h)50.33 mph (81 km/h)
75 mph (120.7 km/h)53.92 mph (86.78 km/h)
80 mph (128.75 km/h)57.52 mph (92.57 km/h)
85 mph (136.79 km/h)61.11 mph (98.36 km/h)
90 mph (144.84 km/h)64.71 mph (104.14 km/h)
95 mph (152.89 km/h)68.3 mph (109.93 km/h)
100 mph (160.93 km/h)71.9 mph (115.71 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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