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Wheel Spacers

Car culture term

What is Wheel Spacers?

Machined discs that mount between the wheel hub and wheel, pushing the wheel further outward to widen the vehicle's track.

Wheel spacers are machined aluminum or steel discs that sit between the wheel hub and the wheel itself, effectively moving the wheel outward from the hub face. The result is a wider track (the distance between left and right tires), which can improve handling by increasing stability and reducing body roll. Visually, spacers give the car a wider, more planted stance and fill out fender arches that might otherwise look empty with stock offset wheels.

Spacers come in two main types: bolt-on spacers (which use extended lug studs or the vehicle's existing studs) and hub-centric spacers (which include a machined center bore matched to the hub diameter). Hub-centric spacers are preferred because they ensure the wheel centers on the hub rather than on the lug bolts, reducing vibration risk. Slide-on spacers pressed against the hub and secured by the wheel's own lug nuts require sufficiently long studs and are generally considered higher risk for daily driving.

Thickness matters. Small spacers (5-10mm) are relatively low risk on properly engineered hubs. Large spacers (25mm or more) stress wheel bearings and may require extended-thread lug bolts. Safety depends on quality, installation torque, and regular torque re-checks. High-quality brands like Eibach, H&R, and Spidertrax are preferred over cheap unbranded units.

Related terms

Hub Centric RingWheel offsetBolt patternStanceCamber

Frequently asked questions

Are wheel spacers safe?
Quality hub-centric spacers installed correctly are generally safe for street driving. Risks increase with cheap unbranded spacers, incorrect fitment, inadequate torque, or oversized thickness that stresses wheel bearings. Re-torque after 50-100 miles of initial use. Large spacers (25mm+) on a daily driver require more caution than small spacers (5-10mm).
Do wheel spacers cause vibration?
They can if not hub-centric. Non-hub-centric spacers allow the wheel to hang on the lug bolts rather than on the hub bore, which causes imbalance and vibration, especially at highway speeds. Hub-centric spacers with a bore matched to the vehicle's hub diameter eliminate this issue.
What size spacer do I need?
Depends on your goal and clearances. Most builds use 10-20mm spacers for stance or to correct wheel offset. You need to verify no interference with the brake caliper, fender liner, or suspension components at full lock and full compression. Measure available clearance before ordering.
Do wheel spacers affect alignment?
Spacers change the scrub radius and can marginally affect steering feel. Large spacers may require a camber and toe re-check after installation. Any significant modification to track width can shift alignment parameters enough to warrant a four-wheel alignment appointment.
Do I need longer lug bolts with spacers?
Usually yes. The spacer consumes some thread engagement length. A general guideline is at least 1.5x the stud diameter of thread engagement. Measure your existing thread engagement, subtract spacer thickness, and ensure adequate engagement remains. If not, extended lug studs or longer bolts are required. Never skimp here.

Wheel Spacers on the blog

The Wheels make the Car: How Fitment changes a Car's whole look
The Wheels make the Car: How Fitment changes a Car's whole look

Swap the wheels and leave everything else alone, and a car can look like a different vehicle. Wheels and fitment are the single highest-leverage change to how a car looks, which is why enthusiasts obsess over offset, size, and how perfectly the wheel fills the arch.

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