NA/NB Billet Enduro Front Hub Installation
Thank you for your purchase of Billet Enduro Front Hubs! These are the biggest, baddest hubs ever created for the Miata platform. We at MiataHubs.com stand behind our product 100%. If you have a question or issue please contact us ASAP. Please be sure to read this entire set of installation instructions through to the end. Ensure the axle nut stays torqued to specification 190lb-ft at a minimum! Read that part again, ensure the axle nut is torqued to 190lb-ft and check it regularly with a torque wrench.
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For any service needs we offer replacement bearing cartridges are also available for individual purchase if you prefer to do the work yourself and not ship the hub back.

Installation Instructions - CONTACT US WITH ANY QUESTIONS OR CONCERNS
Use a new Mazda OEM spindle nut (D06Y-33-042) and Mazda OEM outer dust cap (B455-26-071) for installation.
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Remove original front wheel hub hardware per normal procedures.
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→ READ 2-3 FOR ABS ONLY (V1 hubs with the inboard retainer ring and 8 x M3 screws)
2. Remove the ABS sensor and bolt from the back of the upright.
3. Remove the OEM ABS tone ring from your old stock hub. Use a 3-jaw puller not 2-jaws that can cause damage. Apply a penetrating loctite such as Permatex Threadlocker Green (2900) to all 8 of the small M3 screws. The OEM tone ring will press onto the back of your new Billet Enduro Hub, covering the 8 x M3 screws. Only use the OEM Mazda tone ring as we have noticed variation in aftermarket ones. The V2 hubs have the tone ring machined into the hub body to completely eliminate this need entirely.
ALL CONTINUE HERE
4. Install the (3) super-low-profile allen-head bolts to replace the existing 12mm-hex bolts on your stock brake dust shield or aftermarket brake duct cooling plate.
5. Install the threaded support ring onto the spindle. This needs to be snug but not overly tight, around 40-60 in-lb or so. Our recommended tightening method is a set of channel locks and a soft rag between the channel locks and support ring, do not mar the surface or overtighten.
6. IMPORTANT. Using a set of digital calipers or other appropriate measuring tool, measure from the outer face of the support ring to the inner face of the spindle on which the bearing rests, as shown in the picture below. Be careful to only measure on the flat surface, not on the radius at the base of the spindle. You should get a measurement of 47.0-47.6mm. If the measurement is greater than 47.8mm, STOP IMMEDIATELY and contact us. A measurement above 47.8mm will prevent the axle nut from being torqued properly and will likely result in premature bearing failure. If the measurement is below 47.8mm but outside of the 47-47.6mm range, you may continue with install, but please contact us with your measurements so that we can add to our data.
The current support ring design is compatible with 100% of the spindles that we have measured and tested, but we're still unsure how tightly Mazda controlled this thread depth over the 16 years of NA/NB Miata production. For this reason, we feel that it is prudent for all customers to measure their own spindles during install.
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7. Slide the adapter sleeve over the spindle and threaded support ring. Since you likely won’t have to touch these for quite a while! apply a thin layer of anti-seize or high temp grease on the spindle to help later removal/servicing. The sleeve can be tight, just make sure it’s straight and install it over the support ring. You may need to use some fine grit emery cloth on the threaded ring to get the sleeve to slide over it. If it seems too tight please contact us, do not force it on.
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8. Install the pre-assembled hub unit onto the spindle over the adapter sleeve, ensure the inner races are straight and do not force it on. Align the bearing and it will slide on and fully seat all the way on to the end of the spindle similar to stock.
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9. IMPORTANT. 2 step torque process! Install a new OEM Mazda axle nut (loctite is a good idea) and torque the nut to an initial spec of 100 ft-lb (step 1 of 2). Next, rotate the hub through 3-4 full revolutions in each direction. This step helps to ensure that the bearing rollers are properly aligned in their tracks before torquing to final spec. Once the bearing is rotating smoothly, torque to a final spec of 190 ft-lb or greater (step 2 of 2).
10. IMPORTANT. Fully stake the new axle nut to the slot in the spindle using a broad tipped chisel or punch and a hammer. YOU MUST FULLY STAKE THE NUT. We have seen poorly staked nuts loosen in the past. It is recommended that you CHECK THIS NUT TORQUE ROUTINELY, to ensure it stays tight, if anything ever starts to feel odd on track, this is the first place to look.
11. Install a new OEM Mazda dust cap per normal procedure. The new bearing cartridge has a metal dust “shield” on the outboard side of the cartridge, but it is not a watertight rubber seal like what’s used on the inboard side. It is important to continue using the OEM dust cap to stop water and debris from entering the bearing.
→ ABS ONLY
12. Reinstall the ABS sensor, adding the optional spacer and extended bolt (source this locally depending on your OEM bolt length) . Check for clearance to the tone ring you installed. It will be close but won’t interfere.
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ALL CONTINUE HERE
13. Spin the hub 2-3 full rotations by hand before and after installing a wheel to make sure it rolls smoothly and to get a feel for the new bearing. Rolling resistance will decrease as the seals break in during use, but will always be slightly higher than an OEM ball bearing. This was an intentional design choice based on input from SKF Racing, to maximize bearing life and stiffness for the increased aero and tire loading seen on today’s Miatas. VOILA! Your new Billet Enduro Front Miata Hubs are now installed!
14. As always, routine inspection of all wear items is your responsibility and of utmost importance. Hubs and bearings are critical safety items and should remain on the list of things to check at the track and in the shop. Things you should check include but are not limited to the spindle nut torque, hub flange for fatigue and the small screws on the rear adapter/ring.
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IMPORTANT NOTE. We have spent hundreds of hours testing and developing these hubs before releasing to the public, over three years and on multiple cars. It is recommended that you pay VERY close attention to the bearings during the first few sessions on track. If you notice any unusual sounds or feelings, IMMEDIATELY come into the pits and check for proper nut torque and bearing play. If you find a problem, please contact us immediately.
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Thanks again for your purchase and support of Miatahubs.com as we work to better the Miata community and make this chassis the best thing on racetracks worldwide, winning races and breaking hearts of higher dollar competitors. Feel free to call or text us with any questions or concerns, during install or at the track.
JUSTIN
Please leave a voicemail or text if we don’t pick up!
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Warranty Disclaimer Miata Hubs LLC products and parts are sold “as is” without any expressed or implied warranty of merchantability or fitness for a particular purpose. Miata Hubs LLC shall not, under any circumstances, be liable for any special, incidental or consequential damages, including, person, party, or property, but not limited to, damage, or loss of property or equipment, loss of profits or revenue, cost of purchased or replacement goods, or claims of customers of the purchase, which may arise and/or result from sale, installation or use of these parts. Should such products or parts prove defective following their purchase, the buyer and not the manufacturer, distributor(s), or retailer(s); assume the entire cost of all necessary services or repair as result of a part(s) failure. Installation of these parts could adversely affect the original manufacturer’s warranty coverage. This part is intended for off road use only and is recommended to be installed by a professional.