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Detroit Speed X-tracker hub kit is what you can get, they are $995. I bought mine at Summit when they had $100 off $1000 sale, Strano sells them as well.
Detroit Speed has them available, but I asked about a newer version that uses the C7 hub with no ABS, The adapter is slightly different. A C7 hub is about $100 instead of the more expensive ones with ABS. I got no response to that question.
Strano sells the same kit from DS. He doesn't have any of his own version produced by UMI on the shelf.
Now that I got a F body to autoX and HPDE when not doing rallycross, I now have one major upgrade to worry about. Since mine is a 96, I should probably do bigger brakes at the same time too.
I knew I wanted to replace the wheel bearing, and after reading this thread I'm shocked how inadequate the OE style bearings are. The C7 Z06 wheel bearing is stout enough for me, and I have access to high precision equipment to make adaptors. I'll look into it further. I can have a 3D printed part in a couple of weeks, and realistically I could have steel parts in a couple of months (scheduling).
I've been looking into it. AlphaBC on camaro6 forums says the 6th gen uses X trackers. This seemed like an awesome upgrade for $77 per bearing, however, they have a different wheel hub pilot diametre.
C7 have a few aftermarket options and I'm wondering if anyone knows the difference. There's an SKF BR931002 (they call it X tracker) for $141.45 CAD on r0ckaut0. There's the Moog 513378 for $186.20, and the AC Delco FW412 for $114.10. Both the Moog and AC Delco have "SKF" stamped on the hubs, and outwardly look identical to the SKF unit, with some different numbers etched. I'm contacting SKF to see if they're technically the same and cheaper because they're made in Mexico, or if they cheap out on material/heat treat.
It appears the SKF BR931002 is the C7 X-tracker hub at $114US. From what I've researched, its cheaper than the C5/C6 bearing because of not having the ABS sensor built in. I've also read it is slightly different dimension where it bolts to the adapter so a different or slightly modified version is needed.
Did you get any answers from SKF on the different brands listed?
Thanks for reminding me. SKF got back to me and gave me a nebulous response.
Basically, SKF bearings are made in the US to the highest standards and "meet OE specs".
He couldn't answer any questions about the race bearings. SKF supplies "off shore" parts to AC Delco and Moog which is why they have "SKF" stamps, and he couldn't/wouldn't comment on quality or reliability.
fwiw, China has access to very good equipment (I know that Mazak makes lesser CNC for China than for the US and Japan), and their metallurgy isn't as good.
imo, SKF Corvette is miles better than OE bearings, and somewhat better than AC Delco or Moog. The race bearing is 3X the cost and I doubt it's 3X better.
I'll check the C7 hubs I bought for part numbers - I purchased AC Delcos for a C7 and the hubs are marked SKF. The C7 hub is really burly compared the stocker so even an 'off-brand' is likely to be better.
I'll check the C7 hubs I bought for part numbers - I purchased AC Delcos for a C7 and the hubs are marked SKF. The C7 hub is really burly compared the stocker so even an 'off-brand' is likely to be better.
I have a set of adapters and did some research recently, this is what I learned. BR 930544 appears to be interchangeable and is the X tracker design. I found them at Rock Auto for $241. The only difference I can see is spline count, toner ring, and wiring/connector not being the same. I am not running ABS so that part is not an issue for me.
Google BR 930544/C5/C6/C7 For some reason I can not attach the link. I will be buying these in a few weeks for the new project, hopefully they mount up the same.
Last edited by gjohnsonws6; 10-31-2021 at 11:25 AM.
I have a set of adapters and did some research recently, this is what I learned. BR 930544 appears to be interchangeable and is the X tracker design. I found them at Rock Auto for $241. The only difference I can see is spline count, toner ring, and wiring/connector not being the same. I am not running ABS so that part is not an issue for me.
Google BR 930544/C5/C6/C7 For some reason I can not attach the link. I will be buying these in a few weeks for the new project, hopefully they mount up the same.
Looking at that on RA, it appears to be a C6 rear hub. C7 is slightly different.
I was curious if Rentedmule had a set of adapters for his C7 hubs
Yes, I have C7 hubs on my car. I used an adapter from Jim Dulaney at Road Race Suspension. The C7 hub doesn't have a wired ABS connection.
Did the trackwidth increase with Jims C7 adapter?
It looks like there would be exposed threads from the spindle mounting bolts since the hub is so much bigger deeper.
C7 hubs can work if you do not have ABS. But really you don't save a lot of money after you buy those, and the adapters, and you still left with OEM GM hubs vs. the Xtracker design. Granted the C7 hubs are improved greatly from previos interations, but Xtrackers are designed, specifically for running big camber angles, and sticky tires with the high lateral loads. AND you get you keep the ABS if you have it.
__________________ www.stranoparts.com --814-849-3450 Results matter. Talk is cheap. We are miles beyond the success anyone else has had with the 4th gens, and C5, C6, C7 Corvettes,
10 SCCA Solo National Championships, 2008 Driver of they Year, 2012 Driver of Eminence
13 SCCA Pro Solo Nationals Championships
2023 UMI King of the Mountain Champion
Actually, you can buy a C7 SKF X-tracker hub for just over 100 bucks. As long as you don't need ABS, thats about $265 saved for the pair. The problem is finding someone willing to make the adapter to fit the larger C7 hub. As you can see below, the C7 is larger at the top and won't fit inside anyones C5/C6 adapter that I've seen.
C6 X-tracker below is noticeably smaller.
No track width change and my ABS was already gone. It's been a while since I mounted them but everything seemed to go together fine. They came with new ARP mounting hardware that may have addressed those issues.
So SKF has made a mess, because they have started using that name, X-tracker for a line of hubs that they consider more heavy duty, but they aren't the same thing. This is an example "SKF X-Tracker® technology engineered into SKF premium hub wheel bearings" So that's where it's tricky, because I just looked up C7 hubs and I only see the premium ones, for about $139 or so. Yes, not having ABS sensors helps keep the costs down, but when I compare an SKF Premium C6 to the C7, the cost is about the same, in fact the C5/early C6 is acutally a few dollars less. One could reasonably expect the same for the race hubs too, but not 1/3rd the price for C7 to C5/early C6, no way those are real, race version, X-tracker hubs.
__________________ www.stranoparts.com --814-849-3450 Results matter. Talk is cheap. We are miles beyond the success anyone else has had with the 4th gens, and C5, C6, C7 Corvettes,
10 SCCA Solo National Championships, 2008 Driver of they Year, 2012 Driver of Eminence
13 SCCA Pro Solo Nationals Championships
2023 UMI King of the Mountain Champion
okay.... well that was cool. How about this. Show me these $100 x-trackers for a C7. Because I have a C7, and I need some spare bearings as I track it, a lot.
__________________ www.stranoparts.com --814-849-3450 Results matter. Talk is cheap. We are miles beyond the success anyone else has had with the 4th gens, and C5, C6, C7 Corvettes,
10 SCCA Solo National Championships, 2008 Driver of they Year, 2012 Driver of Eminence
13 SCCA Pro Solo Nationals Championships
2023 UMI King of the Mountain Champion
There are a lot of threads on this throughout several forums. For some reason I am unable to attach a link so I’ll post a photo. From what I have found there are two basic versions. The cheaper one being made in Mexico and the more expensive version which looks identical minus the black oxide coatings and recessed wheel studs, (BR930544) where both versions are made in South Korea.
In one of the threads someone states that GM was so happy with the race hubs on C5/C6 R that they adopted them for use on the C7 ZR1, and not the base model. I could be wrong but maybe this should be further looked into and confirmed.
05-13-2021, 08:03 PM
