Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
185/82r14 vs 185/60r14 Tire Comparison Side By Side
  185/82-14 185/60-14 Difference
Diameter inches (mm) 25.94 (659) 22.74 (577.6) -3.2 (-81.4) -12.4%
Width inches (mm) 7.28 (185) 7.28 (185) 0 (0) 0%
Circum. inches (mm) 81.51 (2070.31) 71.44 (1814.58) -10.07 (-255.73) -12.4%
Sidewall Height inches (mm) 5.97 (151.7) 4.37 (111) -1.6 (-40.7) -26.8%
Revolutions per mile (km) 777.34 (483.02) 886.89 (551.09) 109.55 (68.07) 14.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.53 mph (28.21 km/h)
25 mph (40.23 km/h)21.91 mph (35.26 km/h)
30 mph (48.28 km/h)26.29 mph (42.32 km/h)
35 mph (56.33 km/h)30.68 mph (49.37 km/h)
40 mph (64.37 km/h)35.06 mph (56.42 km/h)
45 mph (72.42 km/h)39.44 mph (63.48 km/h)
50 mph (80.47 km/h)43.82 mph (70.53 km/h)
55 mph (88.51 km/h)48.21 mph (77.58 km/h)
60 mph (96.56 km/h)52.59 mph (84.63 km/h)
65 mph (104.61 km/h)56.97 mph (91.69 km/h)
70 mph (112.65 km/h)61.35 mph (98.74 km/h)
75 mph (120.7 km/h)65.74 mph (105.79 km/h)
80 mph (128.75 km/h)70.12 mph (112.84 km/h)
85 mph (136.79 km/h)74.5 mph (119.9 km/h)
90 mph (144.84 km/h)78.88 mph (126.95 km/h)
95 mph (152.89 km/h)83.27 mph (134 km/h)
100 mph (160.93 km/h)87.65 mph (141.06 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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