Hub centric v Lug centric dually spacers. Please read!

JoeDaddy

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OEM wheels are hub centric. Meaning the hub guides and supports the weight of the vehicle. Also called hub pilot. These will have flat lug holes with little or no taper and the lugs will be flat and sometimes have a washer. They must ALWAYS be used with hub pilot spacers. These can be converted to lug centric by cutting a taper into the lug hole and using tapered nuts.

Lug centric or lug pilot wheels use the axle lugs to support the weight. They will have a funnel shaped lug hole and use a tapered nut. The center hole will also be wider than a hub centric meaning that mixing the two is mistake. Lug pilot wheels will receive no strength mounted on a hub pilot wheel with flat nuts and WILL fail. All lug centered wheels should use tapered nuts! Weather or not you use a lug centered spacer is a matter of strength in the spacer. Meaning a lug centered spacer should be strongest around the lug bosses. The center pilot hub will not touch the rim so there's no reason to use hub pilot spacers with lug pilot wheels.
 
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