Bottom Bracket Selection Guide
Specialized Epoxied-in cup removal video
If you have a 2015 and up Specialized frame such as a Tramac or a Venge disc, and many others, then what you have is an OSBB Pressfit frame that's been converted by the factory to BB30, or OSBB as Specialized calls it. Yes, OSBB Pressfit and OSBB are not the same thing. Now, if you're running a Shimano, GXP, or 30mm spindle, all you need is a BB30 bottom bracket that is appropriate for said crank. But if you want to run one of our DUB bottom brackets, you need to remove the cups. Because they are epoxied in it is impossible to drive them out. Instead, you must cut and peel. Like I said, this procedure is for frames that are native OSBB Pressfit that have been converted to BB30. There are plenty of Specialized frames that are native BB30, so don't go sawing into one of these. We are only doing this on OSBB Pressfit bikes that were converted by the factory to BB30. If you're unsure, send us some pictures and we'll ID if for you. Position the bike so that you have a clear view of what you are doing and with adequate lighting. Wear a headlight if you must. As a precaution I always tape the surrounding area to protect the finish in case something slips or gets dropped. Use painter's tape so it'll come off easily. Do not use duct tape on your paint unless it's on top of the painter's tape. I'm going to do this now. VO: Now that I've got the bike protected and positioned correctly, it's time to begin. Insert the blade through the bottom bracket shell and reassemble the saw. I always run the blade backwards so that it cuts on the pull rather than the push. You have more control this way, but it does draw hot chips towards you, so be advised. Hold the blade as flat as possible to engage both sides at the outset. We don't want any angle cutting because you could break through the aluminum at one point without realizing it. The point is not to cut all the way through. All we want to do is score the material deeply, getting it thin enough so that we can break it and peel it out. Cut, stop, and check progress frequently. Take your time. This is not a race. The unnerving part is scoring the bezel. Once the scoring is good and deep, move over a half an inch or so and do the same exact thing, stopping and checking frequently. You can do it in one cut, but I like to remove a strip, which requires two cuts side by side. Break out the strip and peel out the remains. Clean the epoxy residue with denatured alcohol.
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