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A hub-centric spacer uses matched center-pilot geometry to locate the assembly. A lug-centric arrangement relies on the wheel fastener seats to bring the assembly onto center during tightening. Hub-centric is usually easier to install repeatably, but the word on a listing proves nothing unless both sides of the spacer match the actual hub and wheel.

There is no universal wheel spacer torque spec. For a slip-on spacer, find the specified torque for the wheel fasteners used through that spacer. For a bolt-on spacer, verify two joints separately: spacer to hub, then wheel to spacer. If the documents conflict or do not cover the exact parts, stop and resolve the conflict before installation.

A spacer can move the wheel spokes away from a caliper. That does not mean it can cure every wheel-to-brake interference. First identify where the contact occurs.

Under four conditions, a wheel spacer does not directly change static toe, camber or caster: the same wheel and tire remain fitted, the spacer seats flat, ride height is unchanged, and no suspension or steering parts were adjusted. It still changes effective offset and track width. On the front axle, it also moves the tire contact patch relative to the steering axis, so steering feel can change without the alignment angles changing.

A wheel spacer is a component installed between a vehicle hub and wheel. Its thickness moves the wheel outward. Depending on the design, the wheel may continue to use longer original-style fasteners, or the spacer may attach to the hub and provide a second set of studs or threads for the wheel.

Yes, a front wheel spacer changes scrub radius in a static front-view model. It moves the wheel and tire outward while the suspension's steering-axis hard points stay in place. The signed scrub radius therefore shifts outward by approximately the spacer thickness when the wheel, tire, ride height and alignment geometry remain otherwise unchanged.