Y'know, the bit you screw the BB into. It's a carbon frame.
Seems to have worked itself loose. Anyone have any experiences/solutions.
Fortunately not a frame that was particularly expensive, iirc £300-400.
I'll drop the shop I sourced it from an email, but it's a few years old now. Outside of warranty "i think".
Drill two small tap holes on opposite sides of the tube. Install a bbq and cranks to get it lined up correctly. Used a syringe to inject araldite until it comes out the other hole. Wipe off and leave for 24 hours to cure. Ride.
Well that sounds reasonably simple. Have you seen any good idiot guide videos/instructions for it. (I'll also google)
And trust me, it needs to be an idiot guide.
Not like I've anything to lose is it. Bring me my Black and Decker and let the carnage commence. 😀
Is it push or screw fit?
Screw fit
not that Ive tried it but how about some ptfe tape like you use on your copper pipe fittings 😯
Sounds like the aluminium insert has debonded from the frame.
What's the make of frame out of interest?
Sounds like the aluminium insert has debonded from the frame.
That's exactly what's happened.
It a HED (as in the wheels), they where heavily discounted at the time of purchase and discontinued.
It's been a nice enough bike tbh.
saw this happen on a number of carbon fibre road frames with aluminium alloy BB inserts, typically from galvanic corrosion causing the bonded joint to fail
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in a warranty situation these frames were always replaced FOC by the manufacturer
outside of warranty, high strength epoxy adhesive is your friend...
outside of warranty, high strength epoxy adhesive is your friend...
Just like it was when I was a teenager.....
Not a genuine statement.
To rebond alu insert in a carbon frame you want 3M DP460. Rough the surfaces and clean with IPA before using it, takes a while to cure mind.
At least that was the result of my research and technical comms with 3M when I had to repair a carbon bike years ago. Worked well and the repair was sound till I ended the bike (and myself) in a massive crash at Ft Bill which cracked the alu part (bond and carbon were fine though!).
You'd need to get the insert out to clean it up and bond it though, which is looking tricky from that pic as it was probably made with the carbon around the insert. Hmmm.
Fortunately, that photo's not of my bike.
I think I have a plan of action at least, and the GF is picking me up from work so I'll not do any more harm riding it home.
I've used bog standard araldite to fix that type of problem in the past. worked fine, lasted for the rest of the life of the frame.
cleaning all surfaces sufficiently is the key.
DP460 for the win!
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We used DP420 when bonding OSBB cups on Specialized carbon fibre frames because the lower strength of 420 allowed removal a year down the road; with 460 you'd have ripped the cups out of the frame taking much of the bb structure with them!
Makes sense, I used the stronger stuff cos it was the headset insert on a DH bike, no way I wanted that coming out ever!
For a moment, after turning the BB the wrong way for extraction my hopes rose.
Then I realised the cups had just tightened up against the frame. The shell spins freely against the frame, which is dissapointing.
Not sure how I'm going to extract that yet.
Not sure how I'm going to extract that yet.
The answer is nearly always* "thor soft face hammer"
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*whilst my advice on adhesive was well founded, this particular advice may not be 😉
[url= http://forum.ctc.org.uk/viewtopic.php?f=5&t=82599&hilit=trek+bottom+bracket ]This might give you a few ideas[/url]
Well, first impressions are this is going to be awkward.
I may have to drill a hole through the sleeve just to stop it spinning when extracting the BB
I've emailed HED, and the shop. Wonder if they'll have any useful suggestions.
Check the last post out on the link it may be of visual help.
[url= http://forums.roadbikereview.com/components-wrenching/bottom-bracket-metal-thread-insert-loose-carbon-shell-238174.html ]LINKY[/url]
I'll see what HED suggest, they got back by email within the hour this morning telling me to phone.
Which is a good start, even if it's bad news.
Phone call to factory involved being advised against repair and the use of the word "terminal"
Equilibrium
Phone call to factory involved being advised against repair and the use of the word "terminal"
Did you expect otherwise? They're not going to tell you to fix it when a new frame could be sold!
Well, usually.
But as they no longer make or sell frames it doesnt seem to be the case.
Equilibrium
Quiet you 😆
That Equilibrium does appear to be the right size...
Wonder if I should start a thread...