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Haven't ridden my Mount Vision since July at Grassington, noticed the other day however that the BB appeared to have seized. No problem i thought, whip off the crankset & see what the problem is.
I found a far bigger problem than i anticipated. Drive-side BB cup came clean out still attatched to the crankset axle, both the thread in the BB shell & the BB cup thread are flattened off & don't bind to each other.
I don't think (easily be wrong though) that i cross-threaded them as the threads are still there & i can follow them round. It looks like the bearing seized & the cup started to spin & wrecked the thread, can't see this as the bearings still rotate fairly easily.
Spoke to the nice chaps at Mike Cooksons Cycles & they reckon it might be fixable - fingers crossed!
One thing though, noticed the rear wheel really doesn't like to be spun backwards, will easily rotate forwards though - could this have been a factor?
You can get a threadless BB which screws into itself, for when your threads are wrecked. Have a look on SJS cycles.
Did you try to ride the bike backwards at all?
Don't remember trying to ride it backwards thats for sure 😆
a threadless BB y'say? Might just be the very thing i need!
BETD do a helicoil insert for the BB for &45 when I last looked (per side)
http://www.mountainbikecomponents.co.uk/items.asp?CategoryID=236&Name=Frame+repairs
You can also solder and rechase the threads.
The threadless BB thing is quick and cheap. Only [url= http://www.sjscycles.co.uk/prestine-threadless-sealed-bearing-bottom-bracket-for-frames-with-damaged-threads-prod16505/ ]£20 (clicky)[/url]
Not sure about longevity, and it limits you to square taper. I put one in an old road bike which doesn't get used a huge amount. Might be worth a shot though.
BETD Saved my heckler in under a week 🙂
the betd repair is perfect you can't even tell its a repair.
those threadless bbs are crap dont last long and come undone especially when singlespeeding, even locktight doesn't keep them done up long try velo orange for a better looking one