Cranks DON'T spin

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Cranks DON'T spin
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flag justhitit
Posted: Dec 26, 2008 at 16:48 Quote
hey so i have this problem.
my cranks spin fast at certain points but slow at the top of revolution.
they are odyssey wombolts with a euro bb on my mob
there is no chain or anything on yet just the cranks sprocket and bb attached to the frame. when i take the bolt out they spin freely but when i put the bolt back in and tighten it they are stiff at some spots and smooth at the others.

anyone have any suggestions?
flag jakal44444
Posted: Dec 26, 2008 at 16:50 Quote
maybe the bolt constricting bearings bmx or mtb?
flag streetstyle
Posted: Dec 26, 2008 at 16:50 Quote
did you install the bb and crank yourself?
flag justhitit
Posted: Dec 26, 2008 at 16:52 Quote
yea i am stumped.
MTB
i put them on myself. but i took it to the shop and they dont know either we pulled it all apart and everything was fine regreased it and it did the same thing
flag Gsnickets
Posted: Dec 26, 2008 at 20:00 Quote
just guessing, but the spindle could be bent.
flag element22
Posted: Dec 26, 2008 at 20:11 Quote
Is the BB shell in the frame faced?? Facing makes both sides parallel and then when the cups go in there are parallel otherwise something is bent.
flag rush10
Posted: Dec 26, 2008 at 20:12 Quote
Gsnickets wrote:
just guessing, but the spindle could be bent.

most likely that

+1
flag streetstyle
Posted: Dec 26, 2008 at 20:24 Quote
element22 wrote:
Is the BB shell in the frame faced?? Facing makes both sides parallel and then when the cups go in there are parallel otherwise something is bent.
i dont think you can do that with a euro (threaded) bb..
flag element22
Posted: Dec 26, 2008 at 20:28 Quote
Ahh didn't see that...Perhaps then he installed one cup cross threaded.....I have seen a few come by my shop where someone didn't get one side in right.....But could just be bent.
flag Gsnickets
Posted: Dec 26, 2008 at 21:07 Quote
usually you'll just find that the BB will make some noise from an unfaced shell.... with the cranks not spinning real freely it might even be a bad bearing issue... I've seen a few bad bearings on new cranks and hubs, uncommon, but not unheard of.
flag willbikeforbeer
Posted: Dec 26, 2008 at 21:12 Quote
Do those cranks need that middle spacer inside the bb to load the bearings (gold maybe)? If you don't have that and need it your bearings will be all sorts of messy.
flag norcofreerider8
Posted: Dec 26, 2008 at 21:15 Quote
Had the same problem, my sprocket was bent.
flag Gsnickets
Posted: Dec 26, 2008 at 21:27 Quote
norcofreerider8 wrote:
Had the same problem, my sprocket was bent.

without a chain on, that shouldn't make a difference.
flag justhitit
Posted: Dec 26, 2008 at 23:54 Quote
thanks guys i dunno if the spindle is bent cuz i bought them used but still they spin a lot better then earlier today so im just gunna ride it out and see.
thanks anyways
flag ethier
Posted: Dec 27, 2008 at 8:48 Quote
this happened to my buddy...you've twisted the spindle inside your BB
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