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Front Hubs - 2019 SOTU

 
Old 03-08-2019, 05:31 PM
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Default Front Hubs - 2019 SOTU

From an Andrew Kidd Facebook reply. Deserves a searchable thread, maybe a sticky.

There are four viable bearing options depending on your budget and needs

1. OEM or OEM replacement (Centric Premium). Likely fine for most people who are reading this. OEM grease, OEM-grade ball bearings, proper machining on the backside.

2. OEM/Centric Premium, but repacked with better ball bearings. G10 is usually good enough and is better than stock. The rounder ball will more evenly load all the bearings and increase grease life expectancy. Better grease will tolerate the heat. This is time consuming and you risk damaging the seal, but it's not difficult. **

3. Mazdacomp Endurance (NOT TAPERED ROLLER). This is the same as option 2, but a professional has done all the blueprinting tasks for you. These are markedly better than option 1, and are usually enough for things like Spec Miatas or HPDE cars.

4. MiataHubs Billet Hubs. The beefcakes. For endurance race cars, or big-grip forced induction cars, or anyone who has tried option 3 and only had it last 20-30hrs anyway. If you whine about how much they cost, you don't need these.




**Centric has sorted their inventory and marked the BAD hubs with an E for economy in the part number. Dont buy those.
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Old 03-08-2019, 05:40 PM
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The Centric hub is part #406.45006 (Rockauto has them for $75 each). Do NOT get 406.45006E (with an "E"), which is their cheap version.This is the ABS version, it is cheaper than non-ABS hub.
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Old 03-08-2019, 07:16 PM
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RE: option #2 repack

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Old 03-11-2019, 09:35 AM
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You can repack the hubs without removing the seal and reduce the likelihood of damaging/deforming them. The cages are flexible enough to squeeze out.
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Old 03-11-2019, 10:58 AM
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Where's a good place to source G10 (or other) ball bearings for option 2?
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Old 03-11-2019, 11:46 AM
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Originally Posted by Efini~FC3S View Post
Where's a good place to source G10 (or other) ball bearings for option 2?
I got a ton off ebay a few years back. I wish I would have known you wanted some and then I would have brought some up to you.
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Old 03-11-2019, 12:41 PM
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https://www.miatahubs.com/

Had to look them up just to see the price. $600 each, but they are beautiful!

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Old 03-11-2019, 01:52 PM
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Originally Posted by LukeG View Post
https://www.miatahubs.com/

Had to look them up just to see the price. $600 each, but they are beautiful!

It starts to look cheap compared to a ruined race weekend, a wrecked car, or worse. Plus not having to swap them constantly.
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Old 03-11-2019, 03:00 PM
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Originally Posted by Efini~FC3S View Post
Where's a good place to source G10 (or other) ball bearings for option 2?
www.vxb.com
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Originally Posted by codrus View Post
Basically I've come over to the camp of "If something is a reliability problem on the track, just ask Andrew and do what he says".
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Old 03-11-2019, 05:13 PM
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Originally Posted by shuiend View Post
I got a ton off ebay a few years back. I wish I would have known you wanted some and then I would have brought some up to you.
I was more curious and thought it would be beneficial to the thread...wasn't necessarily looking for some right now.

It's highly likely I'm an option 4 kind of guy...
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Old 03-11-2019, 06:28 PM
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What is the bearing ball diameter?

I like the idea of working around the seals.
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Old 03-11-2019, 09:39 PM
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If anyone needs seals, I use these seals from East Street Racing: Hub Seals
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Old 03-18-2019, 11:13 AM
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Apologies for spoon-feeding request, but is general consensus that Option 1 hubs are sufficient for HDPE use on 200tw tires so long as curbs are mostly avoided?
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Old 03-18-2019, 01:08 PM
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Originally Posted by Morello View Post
Apologies for spoon-feeding request, but is general consensus that Option 1 hubs are sufficient for HDPE use on 200tw tires so long as curbs are mostly avoided?
Generally, yes.
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Old 03-18-2019, 01:45 PM
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Originally Posted by DNMakinson View Post
What is the bearing ball diameter?

I like the idea of working around the seals.
For those of us that may not have a spare front hub to measure *****, I'm interested in this answer.
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Old 03-18-2019, 01:51 PM
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Originally Posted by vtbandit View Post
For those of us that may not have a spare front hub to measure *****, I'm interested in this answer.
Posts 95 and up in this thread discuss, but TL;DR seems to be 13/32"

https://www.miataturbo.net/race-prep...2/#post1376529

However those were from a Timken hub, Shieuend (sp?) had issues with the OEM hub he was going to repack, so your results may vary.
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Old 03-18-2019, 05:09 PM
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13/32" rings a bell. I believe that's the size for the current 11-ball hub. The very original hubs the cars were assembled with in the 90s were actually a 10-ball design with a larger ball bearing, so make sure you know what you have before buying a lot of them.
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Originally Posted by codrus View Post
Basically I've come over to the camp of "If something is a reliability problem on the track, just ask Andrew and do what he says".
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Old 03-18-2019, 05:33 PM
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Originally Posted by Savington View Post
anyone interested in putting in an order for *****?

Ball bearing link

$22 for a 100 *****. $5ish for ***** to rebuild 2 hubs.
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Old 03-18-2019, 06:30 PM
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I'm surprised that the BMW hubs hasn't been mentioned as an option. I know its still very new, but seems to show promise.

https://www.miataturbo.net/race-prep...olution-94536/
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Old 03-18-2019, 06:38 PM
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Originally Posted by 99mx5 View Post
I'm surprised that the BMW hubs hasn't been mentioned as an option. I know its still very new, but seems to show promise.

https://www.miataturbo.net/race-prep...olution-94536/
Very new, and relatively untested. Theoretically should be a good option, but I don't blame Andrew for leaving it off. He is a vendor after all, and his endorsement carries a lot of weight.
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