messed up my bb shell
Cack-handed, ham-fisted, dyslexic fool that I am, I was in a rush, got confused between left and right re-installing my bb and I’ve messed up the threads in the bb shell of one of my bikes 😳 At least it was the oldest cheapest bike but I can’t afford to replace it.
Anyone had the threads on their bb re-tapped? It seems there is a park tool tool that does this but when I phoned up my lbs they said it wasnt possible 😕
Any thoughts?Posted 2 years ago
what’s the frame and BB shell made from?Posted 2 years ago
It depends on how screwed it is. If the shop actually see it in the metal they may decide they can do itPosted 2 years ago
If it’s only the 1st few threads you could try a Saint BB. They have longer cups/threads.Posted 2 years ago
Rescued an aluminium frame myself with a Saint BB earlier this year.
That’s the cheap fist option.
APFPosted 2 years ago
wwaswas its a cheap alu Ridley I use as my commuter/pit bike for cx
StevieD yes only first few threads, but a road bb – if that makes a differencePosted 2 years ago
As above Saint BBs have longer threads on the drive side.
RF X-type DH have longer threads on both sidesPosted 2 years ago
Alu’s probably more tricky but a frame buildre could try and resuce the threads or sleeve it. Might cost more than a second hand replacement though.Posted 2 years ago
Cheers. There is a frame builder near the LBS so might be an option if not too pricy.
I’m pretty sure is only the initial threads and only on drive side so Saint BB might do the trick if it would be road compatible? 24mm axle but i think it sounds like different width cups?Posted 2 years ago
the idea with the saint bb is to use it as a cutting tool to restore the threads, then use the original BB as intended. I’d thread lock the eventual BB in place too, if it were me.Posted 2 years ago
I’ve had a BB shell re-tapped, although that wasn’t cross threaded, more of installed without any grease and left to corrode in place.
Turned out to be easy for the shop (Roll for the Soul if you’re in Bristol)Posted 2 years ago
Get a decent lbs, yours sounds useless.Posted 2 years ago
To be fair they are pretty good normally and I was a bit surprised. However I didnt recognise the voice of the guy I spoke to so might have been new staff.Posted 2 years ago
If it’s only a few threads crossed then it can probably be re-tapped with care. If not then helicoiling will work. And if all else fails then a threadless BB is an option. Your LBS is throwing the towel in too early 😉Posted 2 years ago
Bez +1Posted 2 years ago
Working at home so had a quick look again in the light of day just now, really was only minor damage to the first couple of turns in so a bit of careful filing of the burrs/misshapen threads, a bit of cleaning and very carefull installation and I have a BB in place again 😀
The last one lasted 3 years so hopefully this one will too!Posted 2 years ago
Yeah, on an aluminium frame a robust BB can often tap out minor damage itself 🙂
Smug points for you next time you’re in the LBS…Posted 2 years ago
Was pretty relieved I didn’t have to fork out any cash for such a daft mistake!Posted 2 years ago
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