To your specific problem, perhaps this guy can help: https://www.artscyclery.com/...Bracket-Answers.html

Looks like you can use regular bb30 bearings and reuse the spacers.

Hopefully someone more knowledgeable will chime in.

I spent hours reading about bottom brackets when trying to choose power meters for my bikes.

I am on my third Venge frame. PF30 was a bad idea because the adapter cups would move around and wallow out the BB shell. If you had a crank with a wave washer the washer would compress and crank could move around. Over time it wore out the BB shell. I used to break wave washers every 6-8 months. Luckily Specialized has been really nice about just replacing the frame on warranty. I think my last frame is BB30 for real, rather than PF. No problems with broken wave washers or creaking cups.

The first thing I would check is that your frame hasn't wallowed out. If you clean the epoxy residue off the cups and frame, put the cups in and they move around, there is no amount of that soft epoxy they use will fix your problem.

If your frame is OK then I would try one of the Praxis BB. I haven't tried one, but it is basically a bearing shell with screw-on end caps. The tension of the end caps keeps the shell from rocking.

They are standard BB30 with adaptors.
First remove the cranks and shimano adaptors and feel if the bearings are smooth.
If you knock them out they need to be replaced.

If they are good, then lightly regrease everything and see if that stops it.
If that doesn't stop it or the bearings are rough anyways, knock out the bearings and put new ones in.

If the bearings can be removed by hand, then put the new bearings in with a locktight primer to take up the gap.

I appreciate the responses, everyone.
I took some pictures this morning after removing the cranks and taking off the shimano adapters. It looks like the bottom bracket is in (2) parts rather than a single unit - is that typical? Do these look like BB30's? It looks like these are "pressed in" to the aluminum cups that were adhered to the frame using epoxy by the Specialized dealer.

So if I buy any "BB30" bottom bracket I should be good to go?

Thanks!

Bump - Anyone able to recognize what I have based on the pictures?

Thanks,
Ryan

You just need to replace the bearings.

They are called a 6806.

Are the bearings alone sold separately from the whole BB unit? Would I just look for "BB30 Bearings" rather than BB30 bottom bracket?

Just look for 6806 bearings.

https://wheelsmfg.com/bottom-brackets/bb30/bb30-bearing-clip-kit.html

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That is an osbb bottom bracket. Essentially you have aluminum cups (other models delrin) pressed into the frame and then you press normal bb30 bearings into the cups. Praxis has a shimano conversion BB that is very good for osbb. Includes cups etc. This is what i did with my backup cross bike. The converter system shown above sucks. Stick to praxis.

Ron_Burgundy wrote:

That is an osbb bottom bracket. Essentially you have aluminum cups (other models delrin) pressed into the frame and then you press normal bb30 bearings into the cups. Praxis has a shimano conversion BB that is very good for osbb. Includes cups etc. This is what i did with my backup cross bike. The converter system shown above sucks. Stick to praxis.

I found what you're referring to
https://praxiscycles.com/product/shimano-conversion-bb/


But I don't believe this will work. The Aluminum cups aren't just pressed into my frame, they're adhered to it permanently with epoxy.
It sounds like my only option is to replace the 6806 sealed bearings with new ones. Correct?


Which 6806 bearings should I go with?

So sorry to mislead, my 2013 crux cups are easy to remove and i wrongly assumed yours were similar. My guess is treat it like a normal bb30 BB and get a praxis/ceramic speed conversion to shimano. In other words, simply purchase a bb30 to shimano conversion. Since the cups are glued in no worries about the osbb standards.

There is no reason to buy a conversion kit. He already has the adapters.

I personally do not like those comversion cups. Again, personal preference.

If your old crankset worked fine and you want to keep it, then just replace the bearings. Those are Endura bearings, which are a good quality and not excessively expensive like a Ceramic Speed. I would suggest having your local Specialized dealer replace the bearings. They will have the correct driver and bearing press and they can assess the epoxy bond between the frame and the aluminum cup. The correct epoxy is not a hard permanent bonding type and if the cups come out with the bearing, they will have the epoxy on hand to put it back.

As far as the bottom bracket is concerned. The PF stands for "Pressed Fit". This means you just pressed in the correct adapter for different BB standards. The Delrin cups mentioned above were just plastic sleeves. What you have are the later pressing in aluminum cups. When epoxied into the frame they work well. I haven't used them, but people rave about how well the Praxis works. It might be worth a try if you plan on hanging on to the bike for awhile

You have two options.

1. https://wheelsmfg.com/...earing-clip-kit.html

2. https://wheelsmfg.com/...ct-bearings-red.html

FYI, the BB is 2 above is specific to the older Specialized OSBB with aluminum cups like yours. For the new bikes with the pressed in Delrin cups you need a different version.

I'd go with 2.

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