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Delicate Bottom Bracket issue. Need Advice

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Delicate Bottom Bracket issue. Need Advice

Old 12-08-16, 08:14 AM
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DavidECook
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Delicate Bottom Bracket issue. Need Advice

Friends-
I have a new CAAD12 frame set that I am building with an Ultegra 6800 group set. As you know, this frame is BB30A. I'm using the Ultegra crankset for this build. I'm attempting to adapt BB30A to 24mm HollowTech II.

First Problem:
I accidentally murdered a C-Bear bottom bracket by pressing both cups in at once and the plastic sleeve malformed inside the frame and came in contact with the 24mm crank spindle. Pounding them out of the frame to fix it did them in...

Second Problem:
I've ordered new bottom bracket from Kogel (because their cups are flanged and C-Bear's aren't). I'll be using a Park Tool HHP-2 press to install the cups. Speaking with Kogel, they recommend pressing the cups in one-at-a-time using their drift kit (which I also bought). Obviously I'm concerned about damaging these new bearings/cups.

My Question:
If I press the cups into the frame one at a time, will the press put undue pressure on the first cup while I'm pressing in the second cup? I thought a headset press would put equal pressure on both ends of the press at the same time. Is there anyone who has performed this (or similar) procedure? I'm hoping I can get some guidance from someone with a bit more experience than me. (Since I'm trying to become a 'real' mechanic, I can't go to my LBS out of principal...)

Thanks :-)
DC
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Old 12-08-16, 08:25 AM
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Andrew R Stewart 
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David- No answers to your questions but a comment anyway. How good a relationship do you have with your LBS? If it's a good one perhaps you can make special arrangements with the service dept to allow you to observe their doing the cup press in. Real mechanics share their skills and are usually willing to teach when they can. Besides you might get an "in" with the shop if you find you and they can work together in a mutually beneficial situation. Being of a short list of customers who can help out is one way to get a great reference when it's time to "go pro". Andy.
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Old 12-08-16, 08:35 AM
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deacon mark
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I would eliminate the press fit business and get a Praxis conversion since it appears you are using shimano cranks. Under no circumstances would I have BB30 frame unless I was going to do this conversion.
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Old 12-08-16, 10:35 AM
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I know the OP has gone the more expensive "full replacement" route, which is fine.

Just a data point and alternate route for others also contemplating changing to Shimano cranks on a BB30 or BB30A bike.

I have used the inexpensive and really easy and quick Wheels Mfg Acetal plastic adapters with good results. Just pop them in by hand or a light tap w plastic mallet and bada bing you are good to go. Over a year now and still quiet.

Steve
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Old 12-08-16, 10:54 AM
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DavidECook
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I appreciate the feedback. Fortunately I do have a good relationship with my LBS and after I size up this job, I may just seek them out. On the Praxis front, they don't make a BB30A conversion kit. I've asked and they said they don't have plans to produce one. In the end, however, the simplest solution (Wheels Mfg) just might be what I end up with :-)

But, if anyone has any advice on the HHP-2 question I stated above, I'd welcome any comments there as well.
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Old 01-09-17, 12:05 PM
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oespinoza83
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Old post, but I have the same setup as you do. I used a BBInfinite adapter to get my Ultegra to work. Not a single problem or creak with it since install (early November). Only downside is removal process. You need an air hammer and compressor. You do not need these to service the bearings though, just to fully remove the adapter (selling bike, new cables, etc.).
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Old 01-09-17, 02:22 PM
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Originally Posted by DavidECook View Post
. . . But, if anyone has any advice on the HHP-2 question I stated above, I'd welcome any comments there as well.
Really, if the manufacturer's recommendation is not good enough, then there is none good enough.
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Old 01-12-17, 10:54 AM
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I wouldn't mind a smug reply if you hadn't completely missed the point of my question... But I was able to resolve my issue.
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