Group Buy: E30 Hub Conversion
 

Edit: If you're finding this thread for the first time the group buy has ended. But don't despair, because of the great feedback here the hubs have taken off and I'm now offering them through BroFab a new start up business built around these hubs. So please checkout the website for any future hub needs!

www.Bro-Fab.com


Cracked hubs are a very real problem on Miata's with high grip. Once you progress to spec Miata levels of grip (R7's) or even with the latest crops of 225/245 200TW street tires the front hubs become a disposable item often requiring yearly replacements to avoid the dreaded cracked hub and totaled car. Recently there has been a great billet hub solution brought to market and have been a savior for a lot of race teams and serious privateers. For the average weekend warrior they are simply priced out of being an option.

I’m an engineer, fabricator and all-around car nut who enjoys making more than purchasing and decided to come up with a cost effect hub solution and have been tracking, auto-xing and street driving a prototype for 2 years now. I started with an off the shelf e30 hub, as you can see the hub is much beefier than the Miata hub and has been proven reliable for years on track cars across the world.


https://cimg2.ibsrv.net/gimg/www.mia...769699df20.jpg


This kit includes a set of modified bearings (three choices), stud conversion, hub adapter, spindle sleeve and HD washer as well as a new spindle nut. These adapters combine to create a crack proof wheel bearing that allows all standard Miata brake hardware to bolt up. Wheel offset is not altered and once installed functions exactly the same as stock….but without the risk of cracking. My original goal was to use off the shelf bearings that could be purchased at any parts store but unfortunately there is a lip that needs machined / ground / cut off the bearing to allow for all the stock Miata brake hardware to work. I provide the modification in the kit but if you wanted to modify your own bearings for future replacement it can easily be done since the cut can be made with almost anything.


https://cimg8.ibsrv.net/gimg/www.mia...eac7a4bc79.jpg

https://cimg9.ibsrv.net/gimg/www.mia...7367078b5c.jpg
https://cimg2.ibsrv.net/gimg/www.mia...77989a3ace.jpg
https://cimg5.ibsrv.net/gimg/www.mia...407f1e41bf.jpg

Economy Kit (pair)
This will include:

Drivestar bearings machined to fit
Spindle spacer and washer
Custom Wheel spacers
New spindle nut
Economy screw in wheel studs or Bimmerworld studs

Price: 350$ shipped in the continental US
390$ shipped with the bimmer world studs

My thoughts are this kit will attract the track rat that has the grip but not the cash and doesn't mind changing bearings out every now and then when they get noisy. You can buy 5 drivestar bearings for the price of a single SKF/FAG unit and I’ve yet to wear one out in 20+ hrs of track time 25 auto-x events and 10k street miles. Main objective is to eliminate the chance of cracked hubs on the car.


Racer Kit (pair)
This will include:

Your choice of Timkin or OEM BMW bearings machined to fit (still looking for a better deal on these)*
Spindle spacer and washer
Custom Wheel spacers
New spindle nut
Shouldered bimmerworld studs

Price: 600$ shipped in the continental US with Timkin bearings
675$ shipped in the continental US with OEM BMW bearings

The objective of this kit is to supply the best parts available for the E30 to ensure that a noisy bearing won’t end a race early. This kit will also have the beefier bimmerworld studs that Cwatson has attested to being a more durable option. Crack prevention of course is ensured as well.

* I'm having a hard time finding a better source for SKF, FAG or OEM bearings, seems all the reasonably priced places for the SKF or FAG bearings are sold out at the moment. My costs are the same no matter what bearing is selected, just trying to pass the savings on to the consumer.


Spare machined bearings will be priced as:

Drivestar: 27$ Ea. plus shipping
Timkin: 127$ Ea. plus shipping
OEM BWM: 175$ Ea. plus shipping

I have been able to adapt the Miata ABS tone ring to the E30 bearings so please contact me if this is something you need.

This initial group buy will be for 10 sets, I just need to know your name, bearing and stud preference and I'll order the bearings and studs and hopefully turn them around in 1-2 weeks, payment will be due at time of shipment.

There is no warranty per say on these kits, but these are new to market so I am offering a 6 months no questions asked full refund if you decide you don't like them for any reason. This will most likely change going forward.

1. sonofthehill economy bearings with bimmerworld studs please. paid/shipped
2. bahurd economy bearings with bimmerworld studs please. paid/shipped
3. 99mx5 economy bearings with bimmerworld studs please.
4. TheBandit economy bearings with bimmerworld studs please.paid/shipped
5. BigEasy economy bearings with bimmerworld studs please. paid/shipped
6. Leboeuf economy bearings with bimmerworld studs please. paid/shipped
7. pcormier66 race kit timken with bimmerworld studs paid/shipped
8. portabull economy bearings with bimmerworld studs pleasepaid/shipped
9. Sierra_Bravo economy bearings with bimmerworld studs please.paid/shipped
10.Gee Emm - economy bearing bimmerworld studs paid

11. concealer404 economy bearing bimmerworld studs
12. Lokiel economy bearings with bimmerworld studs (assuming there will be a 2nd batch)
13. mweber economy bearing bimmerworld studs
14. RASKAR economy bearings, bimmerworld studs
15. Maplewood economy bearings, bimmerworld studs
16. jspadaro economy bearings, bimmerworld studs
17. skipstr economy bearings, bimmerworld studs
18. navalhawkeye economy bearings, bimmerworld studs (ABS rings?)
19.dleavitt economy bearings, bimmerworld studs
20. Drezi economy bearings, bimmerworld studs
21. thegrapist economy bearings, bimmerworld studs
22. turbofan poverty bearings, bimmerworld studs. Interested in ABS rings but not strictly required right now.
23. moocow: poverty bearings, economy studs.
24. x_25: poverty bearings, economy studs.
25. Joker economy/poverty bearings, Bimmerworld Studs
26. GotBoost economy/poverty kit/bearings, Bimmerworld Studs, 2x spare poverty bearings

Thanks! I am curious if we can upgrade bearings in the future?

Yep, you can swap bearings to anything you want, just have to trim the hub protrusion.

https://cimg2.ibsrv.net/gimg/www.mia...a26497a9b7.jpg
https://cimg1.ibsrv.net/gimg/www.mia...5c931f9c02.jpg

Copy and paste this list going forward.

1. sonofthehill economy bearings with bimmerworld studs please.
2.
3.
4.
5.
6.
7.
8.
9.
10.

What's the thread on the Bimmerworld studs?

If you read through my thread in the race section cwatson has some feedback that they get longer life out of them. They cost 10$ per stud vs. 5$ for the economy studs.

Sorry i meant like... can i still use my super sweet 949 racing lug nuts? :rofl:

Dur her.....lol. yeah same as Miata pitch

Ok i'm in on an economy kit with Bimmerworld studs, BUT i'm not likely to do anything with my car this year. So i am pre-emptively offering to bump myself to the next Group Buy if this one fills.

Copy and paste this list going forward.

1. sonofthehill economy bearings with bimmerworld studs please.
2.
3.
4.
5.
6.
7.
8.
9.
10.concealer404 economy bearing bimmerworld studs

Cats for you; very nice work!

Copy and paste this list going forward.

1. sonofthehill economy bearings with bimmerworld studs please.
2. bahurd economy bearings with bimmerworld studs please.
3.
4.
5.
6.
7.
8.
9.
10.concealer404 economy bearing bimmerworld studs

Copy and paste this list going forward.

1. sonofthehill economy bearings with bimmerworld studs please.
2. bahurd economy bearings with bimmerworld studs please.
3. 99mx5 economy bearings with bimmerworld studs please.
4.
5.
6.
7.
8.
9.
10.concealer404 economy bearing bimmerworld studs


This should pair up nicely with the MRS rear hubs.

Yeah if I had more time I'd machine them up as a set. Sadfab is kicking ass on them though.

Copy and paste this list going forward.

1. sonofthehill economy bearings with bimmerworld studs please.
2. bahurd economy bearings with bimmerworld studs please.
3. 99mx5 economy bearings with bimmerworld studs please.
4. TheBandit economy bearings with bimmerworld studs please.
5.
6.
7.
8.
9.
10.concealer404 economy bearing bimmerworld studs

I'm noticing a pattern :cool:

Copy and paste this list going forward.

1. sonofthehill economy bearings with bimmerworld studs please.
2. bahurd economy bearings with bimmerworld studs please.
3. 99mx5 economy bearings with bimmerworld studs please.
4. TheBandit economy bearings with bimmerworld studs please.
5. BigEasy economy bearings with bimmerworld studs please.
6.
7.
8.
9.
10.concealer404 economy bearing bimmerworld studs

Copy and paste this list going forward.

1. sonofthehill economy bearings with bimmerworld studs please.
2. bahurd economy bearings with bimmerworld studs please.
3. 99mx5 economy bearings with bimmerworld studs please.
4. TheBandit economy bearings with bimmerworld studs please.
5. BigEasy economy bearings with bimmerworld studs please.
6. Leboeuf economy bearings with bimmerworld studs please.
7.
8.
9.
10.concealer404 economy bearing bimmerworld studs

Copy and paste this list going forward.

1. sonofthehill economy bearings with bimmerworld studs please.
2. bahurd economy bearings with bimmerworld studs please.
3. 99mx5 economy bearings with bimmerworld studs please.
4. TheBandit economy bearings with bimmerworld studs please.
5. BigEasy economy bearings with bimmerworld studs please.
6. Leboeuf economy bearings with bimmerworld studs please.
7. pcormier66 race kit timken with bimmerworld studs
8.
9.
10.concealer404 economy bearing bimmerworld studs

Copy and paste this list going forward.

1. sonofthehill economy bearings with bimmerworld studs please.
2. bahurd economy bearings with bimmerworld studs please.
3. 99mx5 economy bearings with bimmerworld studs please.
4. TheBandit economy bearings with bimmerworld studs please.
5. BigEasy economy bearings with bimmerworld studs please.
6. Leboeuf economy bearings with bimmerworld studs please.
7. pcormier66 race kit timken with bimmerworld studs
8. portabull economy bearings with bimmerworld studs please
9.
10.concealer404 economy bearing bimmerworld studs