Im an idiot - removal of FSA cranks
Discussion
So im replacing the cranks on my Boardman Pro Carbon hardtail - they are FSA Comet BB30 cranks.
On the non-drive side there is one 10mm hex bolt:
It turns one way, and when its off im left with:
Im used to shimano external BB's, but ive removed an FSA crank a few years back that had a self-extracting bolt - but this doesn't seem like one as it only turns one way.
Does the non-drive crank arm just come off now (with encouragement from a rubber mallet), or do I need a special tool, or am I doing something wrong?
Help - I have shiny carbon bits to go on!
On the non-drive side there is one 10mm hex bolt:
It turns one way, and when its off im left with:
Im used to shimano external BB's, but ive removed an FSA crank a few years back that had a self-extracting bolt - but this doesn't seem like one as it only turns one way.
Does the non-drive crank arm just come off now (with encouragement from a rubber mallet), or do I need a special tool, or am I doing something wrong?
Help - I have shiny carbon bits to go on!
Looks like you are missing a bit - the self extracting bit
This is what mine looks like, turn one way and the whole arm loosens then self extract
This is what you need...
http://www.ukbikestore.co.uk/product/391/230_5004/...
This is what mine looks like, turn one way and the whole arm loosens then self extract
This is what you need...
http://www.ukbikestore.co.uk/product/391/230_5004/...
Wilmslowboy said:
Looks like you are missing a bit - the self extracting bit
This is what mine looks like, turn one way and the whole arm loosens then self extract
Yep, that's what the new crank looks like - it has the self-extracting bit - god knows why my current crank just has a standard bolt that doesn't allow you to remove the cranks?!This is what mine looks like, turn one way and the whole arm loosens then self extract
daddy cool said:
Yep, that's what the new crank looks like - it has the self-extracting bit - god knows why my current crank just has a standard bolt that doesn't allow you to remove the cranks?!
Ok then just take the collar of the new crank - pop it on the old crank, and extract - job jobbed !!!The reason the current crank has a std bolt...is because the nice guys at the bike shop nicked the collar bit ....or perhaps the collar fell off....
Wilmslowboy said:
This is what mine looks like with the collar off (the self extracting bit)
Ah I see - yes it does look like the collar has gone walkabouts...How do I get the collar off the new crank though? Its on there flush. Do you need a special tool with 6 prongs that match up with the holes?
I can see me dropping everything off at the LBS!
I use two forks, just need to get a couple of prongs in a hole on each side.....bit of a bodge but it works .....
Should not be too tight, the collar doesn't hold the crank on, the bolt does that, the collar only needs to be tight enough for the bolt to push against it when extracting.
Should not be too tight, the collar doesn't hold the crank on, the bolt does that, the collar only needs to be tight enough for the bolt to push against it when extracting.
Wilmslowboy said:
I use two forks, just need to get a couple of prongs in a hole on each side.....bit of a bodge but it works .....
Should not be too tight, the collar doesn't hold the crank on, the bolt does that, the collar only needs to be tight enough for the bolt to push against it when extracting.
Ok... sounds like a plan - just a bit worried about scratching my lovely new carbon cranks that I still haven't fully justified to myself for buying...Should not be too tight, the collar doesn't hold the crank on, the bolt does that, the collar only needs to be tight enough for the bolt to push against it when extracting.
Does the collar unscrew clockwise or anti-clockwise?
upsidedownmark said:
I'd try belting the NDS crank with a rubber mallet (or a block of wood) first. Or just wriggling it. Shouldn't *need* the self extracting bit, pretty sure they're not actually on a taper.
they are on a taper, and you do need* an extractor (be it self extracting bolt, or a crank extractor tool).- yes you could use a hammer and just batter it, but this is not recommended
Well, I took it my local LBS - based on recommendation I went to Sam's bikes, between Bracknell & Maidenhead.
http://www.samsbikeshop.co.uk/
He's was too busy at the moment to have the bike in to do the whole job (inc bearings) but kindly hunted around for a spare "collar" and then removed my NDS crank arm (free of charge).
Took the bike home and swapped the bits over, leaving the existing BB30 bearings as they are running smooth.
Quick test ride in the road seems fine - hope for an extended Swinley ride tomorrow afternoon.
But they look sexy and have made a decent contribution for my sub-10kg target!
http://www.samsbikeshop.co.uk/
He's was too busy at the moment to have the bike in to do the whole job (inc bearings) but kindly hunted around for a spare "collar" and then removed my NDS crank arm (free of charge).
Took the bike home and swapped the bits over, leaving the existing BB30 bearings as they are running smooth.
Quick test ride in the road seems fine - hope for an extended Swinley ride tomorrow afternoon.
But they look sexy and have made a decent contribution for my sub-10kg target!
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