Wheel bolt pattern

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==Measuring bolt pattern or bolt circle==
 
==Measuring bolt pattern or bolt circle==
Pitch circle diameter (PCD) or bolt circle diameter, means the diameter of an imaginary circle that goes through the center of each of the wheel stud bolt holes on a wheel. The wheel stud bolts are fixed to either the brake drum or the disc brake rotor and protrude through the wheel when it is mounted to the drum or rotor (there are a few vehicles that use wheel bolts instead of fixed studs and lug nuts, old MOPAR and VW are two.
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Pitch circle diameter (PCD) or bolt circle diameter, means the diameter of an imaginary circle that goes through the center of each of the bolt holes of a wheel. The wheel stud bolts are fixed to either the brake drum or the disc brake rotor and protrude through the wheel when it is mounted to the drum or rotor (there are a few vehicles that use wheel bolts instead of fixed studs and lug nuts, old MOPAR and VW are two.
  
 
The PCD can be expressed in mm or inches. The PCD can be found on any 5 lug wheel by measuring from the center of the wheel (the axle hole), to the center of one of the wheel stud holes, and then multiplying that measurement by two. This is difficult on the 5 hole wheel because it is hard to judge the exact center of the large axle hole in the wheel.
 
The PCD can be expressed in mm or inches. The PCD can be found on any 5 lug wheel by measuring from the center of the wheel (the axle hole), to the center of one of the wheel stud holes, and then multiplying that measurement by two. This is difficult on the 5 hole wheel because it is hard to judge the exact center of the large axle hole in the wheel.

Revision as of 12:24, 23 January 2013

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