If this is the case, it is recommended that you use a hub ring. Since most wheels are mass produced, they have a large center bore to accommodate several different vehicles. Hub Center Bore: Relates to the center hole in the wheel that centers the wheel on the hub of the car. Learn More: How To Properly Torque Lug Nuts / Lug Bolts Hub Center Bore Check your vehicle owner manual for specifications. Lug Nut Typesīolt Pattern Torque Sequence / Specifications:Īlloy wheels should always be installed using a torque wrench ensuring proper mount. If there is an ODD number of lugs: Measure from the CENTER of one lug to the OUTER EDGE of the hole diagonally across from it. If there is an EVEN number of lugs: Measure center-to-center on lugs directly across from each other. The measured diameter of an imaginary circle formed by the centers of the wheel lugs or bolt holes. Measure from the inside of the outer lip at the bead seating point to the inner lip.įrom the inside of the wheel at the point where it contacts the hub, brake drum or axle flange to the inside edge (lip) of the wheel. The actual diameter of the wheel at the point where the tire bead seats ( NOT the outer lip of the rim). There are four important measurements that are used to categorize and identify a wheel for fitment purposes. A bolt circle of 5 x 4.5 would indicate a 5 lug bolt pattern on a circle with a diameter of 4.5 inches. Bolt patterns can be 3, 4, 5, 6, 7, 8 or 10 lug holes. Key Identifying Wheel Dimensions: Wheel Bolt or Lug Pattern (or bolt circle, lug circle, lug pattern, etc.) is the measured diameter of an imaginary circle formed by the centers of the wheel lugs or bolt holes.
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