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Guide
Precision Fitment Reference

Center Bore & Hub Centric Rings Guide

Find the exact hub centric ring size for your aftermarket wheels. Eliminate high-speed steering wheel vibrations, learn the difference between hub-centric and lug-centric mounting, and compare plastic vs. aluminum rings.

Hub Centric Ring Size Calculator
Custom ID:mm
Custom OD:mm
Required Hub Ring Sizing Specification
73.1 mm OD→64.1 mm ID
Wall: 4.5 mm
Polycarbonate / Nylon:Daily driving, winter climates, zero corrosion or wheel seizing.
CNC Billet Aluminum:Track days, autocross, and high brake rotor temperatures.

Hub-Centric vs. Lug-Centric: Why Precision Centering Matters

When factory engineers design wheels for OEM production, the center bore of the rim is machined to exact tolerances (within 0.05 mm) to fit snug over the hub snout of the axle. This is known as a hub-centric fitment.

Hub-Centric Mounting (Factory Standard)

The wheel is centered mechanically by the raised circular lip on the vehicle hub snout. This guarantees the wheel spins on its true rotational axis, protecting the lug studs from radial shock loads when striking potholes.

Lug-Centric Mounting (Universal Wheels)

The wheel relies entirely on the conical (tapered) or ball seats of the lug nuts to center itself as they are tightened. Even slight uneven torquing leaves the wheel off-center by fractions of a millimeter, inducing high-speed steering vibration.

How to Read Hub Centric Ring Sizes (OD x ID)

Hub ring dimensions are universally expressed as Outer Diameter (OD) x Inner Diameter (ID) in millimeters:

  • Outer Diameter (OD): Must match the center bore of your aftermarket wheels (e.g., 73.1 mm, 72.6 mm, or 106.1 mm).
  • Inner Diameter (ID): Must match the axle hub snout diameter of your vehicle (e.g., 64.1 mm for Honda, 56.1 mm for Subaru, 66.1 mm for Nissan).
  • Example Specification: 73.1 mm to 64.1 mm converts a standard tuner wheel to fit a Honda Civic or Accord.

Curing the Infamous 55–75 MPH Highway Shake

If you recently installed new aftermarket wheels and tires and your steering wheel begins to shake or vibrate when cruising between 55 and 75 mph—despite the tire shop performing road-force balancing twice—the issue is almost certainlymissing or incorrectly sized hub centric rings. Without rings, universal aftermarket wheels settle slightly off-center on the hub studs during torquing, creating radial runout that feels identical to an out-of-balance wheel.

Hub Centric Rings Frequently Asked Questions

What is a vehicle center bore?

Center bore is the machined circular opening at the center back of the wheel that fits over the protruding center axle hub snout of the vehicle. For example, modern Honda passenger cars have a 64.1 mm hub bore, while most aftermarket tuner wheels feature a 73.1 mm center bore to accommodate multiple vehicle makes.

What are hub centric rings (spigot rings)?

Hub centric rings are precision-machined plastic or aluminum sleeves installed into the back of an aftermarket wheel with an oversized center bore. They fill the gap between the car's smaller hub snout and the wheel's larger center hole, ensuring the wheel is perfectly concentric with the axle center.

Are hub centric rings safe for track days and high speeds?

Yes, in fact they are strongly recommended. While the clamping force of torqued lug nuts holds the wheel laterally against the brake rotor, hub centric rings center the wheel precisely during initial torquing, preventing off-center mounting that causes steering wheel vibration at highway speeds (55-75 mph). For high-heat track use, billet aluminum rings are preferred over plastic.

Can I install a wheel with a center bore smaller than my car's hub?

No. If the wheel center bore is even 0.5 mm smaller than your car's hub snout, the wheel cannot sit flush against the brake rotor face. Forcing the lug nuts tight will distort the brake rotor, bend the wheel hub pad, or shear the lug studs.

Should I choose plastic or aluminum hub centric rings?

Polycarbonate (plastic) rings will never corrode or seize to the wheel or brake rotor, making them ideal for daily drivers and areas with road salt in winter. Aluminum rings offer higher thermal resistance for racing applications but require a light coat of anti-seize lubricant on installation to prevent galvanic corrosion bonding.