Chubs are in production for the NC and ND. Due here around March-April 2025

Pre order special during now and through or Orange November sale
https://www.949racing.com/orange-november-sale/

Same synthetic grease and grade 10 bearings as our NA/NB hubs. Includes Supermiata extended ball tip 12.9 grade studs.
ND Front and rear are OEM replicas but with 11mm forged billet flanges.
NC front is a hybrid of the much larger S1 RX8 bearing shell but with the NC sensor package. The hot set up in the past was the S2 RX8 hub which was about the same size as the NC hub and PNP with the NC ABS.
We'll have pics later on but if you have ever seen an original S1 RX8 hub, they are way beefier than the NC or S2 RX8. The geometry was the same as NC they just had the wrong ABS plug. So we made S1 RX8 hubs with an even thicker forged flange and NC ABS tone ring and plug. Voila!

Bearing diameter, front hub
13/32" NC
3/8" S2 RX8
1/2" SPM Chub

NC / S2 RX8 front


NC Rear


ND Front



ND Rear

 

Running on a set of RX8 front hubs right now but I'll be picking up a set of these next season!

Running S2 RX8 fronts on my car because that's all that can be found currently(?) I couldn't find a set of S1's anywhere but the S2 hub barrel was still larger than the NC one so I figured it was an improvement. Stoked you guys have a better option.

 

S1 hubs don't have the right plug for the ABS harness. If you run w/o ABS, they'll actually fit the car. That's what gave me the idea for the hybrid.

 

Yup the S2 is a slightly larger shell than the NC, but the S1 is quite a lot larger, it just doesn't work with the ABS sensor.

 

 

So you got bigger ballz, gotcha

(sorry could not resist this one)

 

It's okay. Absolutely every single male that saw that picture on the internet had the exact same thought.

 

NC Chubs in stock!

 

 

Rolling element (ball) diameter is only part of the equation. How many ***** per row in the three examples shared? There are other factors as well, but guessing you wont share those (understandable).

Thanks

 

Total bearing surface area matters, more in this case. Simply put, the S1 RX* is a bigger bearing with more load capacity. Which is why we used it as for our NC hub. The S2 RX8 hub was the default hub from Mazda Motorsports for the cup cars, FWIW. Ours are bigger than that.

 

Thanks. I can understand not wanting to share the technical details of your design. I was just curious.

 

It's not that we don't want to share the technical details of the design. This is a Mazda OEM design. All we did was take the S1 RX8 bearing assembly, make the flange thicker, have it packed with synthetic grease, and make the ABS PNP with the NC. Then buy hundreds of them so we can get the price down.

 

Got it. I guess I was confused by the third ball being 12.7mm.

 

We have them labeled NC - RX8 - Chub because nobody puts the S1 RX8 bearing on an NC due to the fact that the ABS isn't compatible. Technically, those three bearing sizes could also be labeled NC - S2 RX8 - S1 RX8.

Pretty much no matter how they're labeled, someone's going to get confused haha. The point is, in this case (and in braking zones), bigger ***** are better, within reason.