Complete NA/NB Modular Spherical bearing kit consisting of 22 units totaling 154 components with installation. This spherical bearing kit is the best bang for the buck modification that can be done to the NA-NB Miatas suspension after coilovers. Eliminating lost motion in the suspension caused by rubber deflection will yield more consistent camber curves and contact between the vehicle’s tire and road surface.

The spherical bearings are easily serviceable and very affordable to replace.

NOTE :

We ONLY offer in-house installation for spherical bearings. Here is why:

1. We have jigs built to eliminate the risk of bending control arms while removing the OEM bushing

2. The OEM control arm bores hold very poor tolerances. We bore these holes out .003-.008" to fit our slightly over sized spherical bearing bodies.

3. A different installation procedure is required for the locations where the Mazda's long bolts are used. Unlike all other locations on the chassis, when securing the long bolt, both bushings and center sections are pulled into one secured assembly. The center section on the front of the chassis is part of the crossmember. The center section in the rear of the chassis is the spindle. If there is any space between the OEM compliance bushing sleeves and the center section, the bushings will deflect when tightening the long bolt. If the same space is present with spherical assemblies, the control arm will deflect when tightening the long bolt. This will also put a large amount of axial preload on the spherical bearings, which will drastically reduce longevity. Depending upon the rigidity of the control arm, even a 1/32" deflection could place more axial preload on the bearings than they are rated for. This is why Keisler Automation has developed a spherical bearing assembly that offers finite axial adjustability; which to our knowledge is the first of its kind.

SHIPPING:

Provide us with overly secure packaging when sending in your control arms/ rear spindles. We don't want a box to arrive with an arm sticking halfway out.

Shipping tips-

Don’t exceed 50lb packages. This will reduce the chance of damage to your control arms and the packaging. This will also avoid the UPS additional handling charge. 2 packages for a complete set is best.

Using zip ties to secure sets of arms together will reduce loose motion

Package tightly. Loose motion is your worst enemy.

Provide a return shipping label in the box

If sending rear lower control arms, we must have your spindles and the long bolt and nut which mates the RLCA to the spindle. This positioning of the spherical assemblies is extremely critical and we must have the spindles and long bolts to ensure proper installation.

Installation turn around time is typically 1-5 business days. Contact us for a more approximate schedule .

We have more than one location. Please message us to confirm the correct shipping location is used.

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If purchasing less than a full set, select the singular option and increase the quantity to your desire.

OPTIONS:

Our base package includes COM-10T bearings from midwest control as shown here-

https://midwestcontrol.com/shop/COMT-10

We also offer PNB-10T bearings from Aurora as shown here-

https://cad.aurorabearing.com/item/high-performance-units-spherical-bearings/pnb-tg-pnb-t-series-spherical-bearings-ptfe-lined/pnb-10t-2

Aurora is known to have superior bearing life, but it does come with a higher price tag.