Bottom Bracket Selection Guide
Cutting A Bottom Bracket Out of a Cervélo Aspero, Oh My!
This technique goes way beyond Cervélos, as it pertains to any bike with a thread-together style bottom bracket installed. Thread-together bottom brackets often get jammed or fused together and will not come out, correct wrenches or not. That's where the technique shown in this video becomes the only way to get it out. For those not immediately familiar, a thread-together, or thread-fit, or sometimes called torque-tight bottom bracket, is a two-piece bottom bracket system that, as the name states, threads together within the frame shell of a bike intended for PressFit. This hybrid system is supposed to be better than PressFit because...threads! But then in practice it's not a very good setup. It loosens, then creaks, doesn't align bearings properly because it's multi-piece, requires special, expensive bespoke wrenches that can be hard to find, and so on. BBInfinite is here to solve the bottom bracket creaking and squeaking that's ruining you ride. BBInfinite doesn't just fix a bottom bracket creak, we deliver the highest spin performance of any bottom bracket system out there. Faster and creak-free? Absolutely, with BBInfinite. Check us out at www.bbinfinite.com For fast service and quickest responses contact us via Facebook or Instagram messenger, or email at info@bbinfinite.com.
Hey everybody this is a Cervélo Aspero. They've been around for a little while, we're gonna put a bottom bracket in this because obviously it needs it. This is what happens when a Pro races it for one race. Essentially in really bad conditions but uh this doesn't have a bb infinite in it has that that screw together one that Cervélo's been putting out with all their bikes lately that requires some special tools I'm going to show you how to get it out without purchasing those special tools you will never use again all right this is basically what's in here right now is one of these little screw together bottom brackets and what I want to show you is what we're going to do with the dremel tool I'm going to be removing this bearing in just a second because we are going to be getting into it with one of these little dremel tools this is a high speed cutting tool that that it works on wood plastic and of course aluminum wouldn't want to use it on steel but though you want to put them in the arbor so it still can get a pretty good reach because you want to get out past this threaded area because the whole point of this cutoff tool is see how short the profile is it's going to be just long enough to go through the wall of this but not so tall that even if you go through the wall completely which is what we're going to do and go all the way around it'll never come up high enough to contact the inner diameter of the bottom rack because the inner diameter of the bottom bracket is 46mm this is like about 34 and this is barely going to cut through it so there's still going to be a big air gap in there once this blade goes through and it has no chance of hitting the carbon on the inside because I know that's going to be obviously a big concern we don't want to come in here with this dremel tool and cut through this bottom bracket and then start sawing into our bike it's going to be a very bad day right so that's what we're going to do and I'm going to start by getting a good visual on what's going on inside of here and for that you need to remove this bearing all right so we're going to go ahead and we're going to tap this bearing out and you see I'm using just the walk it out with a drift method this is the same way you would take bearings out of our own bottom brackets there are a lot of special tools on the market for all these different things I don't like one hit wonders- no pun intended, I just like to get the job done. You guys are going to want to wear eye protection because this is a non-ferrous metal coming off here. Of course, it's aluminum so you're not going to be able to use a magnet to get it out of your eye once it's in there. If you can't wash it out it's going to be super uncomfortable and very inconvenient and ear protection is always a good idea because it's going to sound like you're at the dentist and get right in here on the back side of our cut -and this is not staged -and this is this is how easy this comes out all right and then I wonder if I can just grab it and pull it out nope not yet this is a really good illustration what I was talking about at the outset here's the visual come on in and see what I mean by this blade is not thick enough to go all the way through you see the air gap down and down in the space there it's impossible it really couldn't even hit the carbon at all that's what you're looking for now if this is a BB86 bike it's going to be a lot closer in there so be advised think about what you're doing before you do it this is the cut off piece we want to get square up on it and just tap it right on the face just like that right on the face of where we cut and it's going to come out of there pretty easy this is actually the threaded side and here's what came out you see the cut all the way around it's a kind of jagged but got the job done and if you want to come in here I will show you that there is not a single mark at all not even the slightest in this carbon whatsoever and that's what you call success
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