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Group Buy: E30 Hub Conversion

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Old 05-21-2019, 05:08 PM
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Originally Posted by bahurd
The Japanese engineer would’ve used the ISO fit system then. Hub dia is 54.1 and if they used a F8/h7 fit basis the factory hub tolerance would be Max 54.01- Min 54.07 with a wheel centering hub diameter of 54.176 - 54.13

We don’t actually know what fit tolerance they used

What diameter/tolerance are you making your hub snout?
Funny you posted that, so that's what I based my assumptions on and used 54mm on the dot to allow for a .13 to .17mm slip fit. I double checked this with my wheel spacer supplier since they specialize in custom wheel spacers and they confirmed this size. I also test fit this on my Jongbloeds which was a snug but slip fit and fell into my 6ul's since they aren't hub centric.

I pulled an oem 14" 7 spoke off of my parts car and sure enough the spacer wouldn't go on without force even after cleaning up the corrosion. Once I had it cleaned up it measured 53.99mm -54mm so not nearly enough clearance for a slip fit.

I'm changing the snout diameter to 53.9mm which will correct the issue. I've only sent out two sets so far so this will be an easy fix on my end and I'll make it up to Sonofthehill for taking one for the team.

Sorry if this shook anyone's faith but things will be set right.
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Old 05-21-2019, 05:16 PM
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I think most of us wouldn't have noticed because, well, who on this group buy list still puts stock wheels on their car?
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Old 05-21-2019, 05:37 PM
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It's amazing how those little things like that will catch you off guard. I work for a small company and we run into stuff like that all the time. Easy fix though.

Originally Posted by turbofan
I think most of us wouldn't have noticed because, well, who on this group buy list still puts stock wheels on their car?
I run a set of the 95M BBS on the street. But need 5mm spacers to clear my 11" brakes though.
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Old 05-21-2019, 08:24 PM
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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
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Old 05-22-2019, 11:09 AM
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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

Last edited by GotBoost; 05-23-2019 at 10:54 AM. Reason: fix index
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Old 05-22-2019, 12:52 PM
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Howdy! Awesome to see some front hub options to go in parallel with the sadfab rears. Just curious if you have test-fit this over some 2.5 or 3" brake ducts like the ones from TSE ?
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Old 05-23-2019, 11:22 AM
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I'm running some home made brake ducts that clear since they are flat with the mounting bolts. I believe the singular/tse ducts are very similar and would work as well. These bearings still fit within the footprint of the ABS ring location so I don't forsee any issue.
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Old 05-23-2019, 11:30 AM
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Double posting to say I've got the machining corrections worked out for the next batch and started fixing this batch last night. I'll try my best but I don't think I'll get all of the 1-10 spots done before I head to the track Friday evening. They will go out pending payment early next week though since Monday is a holiday. The second batch of spacers are on the CNC now so I'll have spots 11-30 covered with one acception, I'll be changing to WJB bearings as the provider for the poverty bearing. Hate to make a change but I've gotten several good reviews from BMW guys and honestly I like the machining on them. If we have any issues with them I'll make it right.
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Old 05-23-2019, 08:28 PM
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So I made a bunch of progress last night and this evening. Spots 1 through 9 are ready to ship! To avoid having to PM each of you please send PayPal or arrange for other methods via bronsonwm"at"gmail"dot"com (at = @, dot = .) Make sure you include a description of your order, screen name and address.
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Old 05-24-2019, 07:40 AM
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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
27. Stevos555 - SKF hubs (once they are in stock) and BM studs.

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Old 05-24-2019, 09:52 AM
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Any chance we can see those instructions on here?
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Old 05-24-2019, 11:37 AM
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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
27. Stevos555 - SKF hubs (once they are in stock) and BM studs.
28. Reserved for track rat friends
29. Reserved for track rat friends
30. Reserved for track rat friends

I've attached the instructions
Attached Files
File Type: docx
Instructions R1.docx (1.44 MB, 164 views)

Last edited by Bronson M; 05-27-2019 at 01:37 PM.
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Old 05-24-2019, 05:43 PM
  #73  
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Will this work with the v8 roadsters big brake kit that uses an after market rotor?
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Old 05-25-2019, 05:11 AM
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I would assume it would; my understanding is that the spacer is there so that the bearing has the same offset as the stock one for brake rotor purposes. If it works with the stock hub, it will work with these as well.
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Old 05-25-2019, 11:21 AM
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Originally Posted by HarryB
I would assume it would; my understanding is that the spacer is there so that the bearing has the same offset as the stock one for brake rotor purposes. If it works with the stock hub, it will work with these as well.
I think the inner diameter is a bit larger than the factory rotors. I’ll take mine apart and get some measurements.
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Old 05-27-2019, 01:35 PM
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Originally Posted by bean66
Will this work with the v8 roadsters big brake kit that uses an after market rotor?
Yes, these work with factory Miata rotors and copy the diameter of the miata hubs so anything that fits a stock hub should fit on these hubs.


Had a great weekend at Pitt Race but one of my fellow track rats dodged the big one. He felt something funny coming through the high speed sweeper on the back strait and it continued into 11, he made the right call to dive into the pits and barely made it to the paddock with the wheel on the car. This is what he found.





This was a Timkin with the less desirable machining. Needless to say he and a few others are jumping on the waiting list.
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Old 05-27-2019, 10:19 PM
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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
27. Stevos555 - SKF hubs (once they are in stock) and BM studs.
28. Reserved for track rat friends
29. Reserved for track rat friends
30. Reserved for track rat friends
31. paNX2K&SE-R: economy bearings, bimmerworld studs, abs rings
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Old 05-28-2019, 02:45 PM
  #78  
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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
27. Stevos555 - SKF hubs (once they are in stock) and BM studs.
28. Reserved for track rat friends
29. Reserved for track rat friends
30. Reserved for track rat friends
31. paNX2K&SE-R: economy bearings, bimmerworld studs, abs rings
32. imclumzy: race kit Timken with Bimmerworld studs
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Old 05-28-2019, 03:21 PM
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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
27. Stevos555 - SKF hubs (once they are in stock) and BM studs.
28. Reserved for track rat friends
29. Reserved for track rat friends
30. Reserved for track rat friends
31. paNX2K&SE-R: economy bearings, bimmerworld studs, abs rings
32. imclumzy: race kit Timken with Bimmerworld studs
33. Roedkill: economy bearings, bimmerworld studs
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Old 05-29-2019, 02:28 PM
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Good news got my hands on a dozen ABS rings, looks like for now I can do them for 30$ a pair, price may go up in the future and I'll refund 20$ a pair if you send me a pair to machine.
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