Threadless Bottom Brackets

http://cgi.ebay.co.uk/YST-bottom-bracket-for-DAMAGED-FRAMES-113mm_W0QQitemZ370092634152QQcmdZViewItemQQptZUK_sportsleisure_cycling_bikeparts_SR?hash=item370092634152&_trksid=p4634.c0.m14

anyone used these before?
my frame has a french threaded BB and I'm thinking it might be simpler/a lot easier to get one of these instead.
Do they just slot in?

the bb shell splits in two (you can see the seam on the picture on the auction) it just slides in the screws into itself instead of the frame... quite clever!

They are clever, not sure how much force I would chuck throught them though.

Have you checked if someone could re-face it?

P-RICEY!
I reckon I could find a french BB if I looked long enough/had the money, but £15 for a BB that I can fit myself seems to good to miss.
Maybe to good to be true....I am yet to measure the shell and see if they do one that fits...

That said I have no idea how much re-facing/threading would cost.

a little sketchy for fixed riding unless you threadlock the shit out of them. £40 for re-threading off the top of my head...

Im not sure i understand, whats to keep the whole BB from spinning in the BB casing in the frame?

Im not sure i understand, whats to keep the whole BB from spinning in the BB casing in the frame?

I think the bearings would have to pretty f*cked for this to happen.

It compresses into the frame itself, held by friction.

Ohhhh, makes sense,
so its just really tightly packed in, or is it placed in then the BB shell expanded in some way(which would be the way i would make it)?

option a?

Yeah, you screw it together basically and it as you screw tighter the cups are slightly tapered and force in - hope that makes sense :l

Oh, i got it the second time dont worry.

I've had one of these fitted recently to my fixed, only done about 40 - 50 miles on it so far with skids an all, no major issues and the shop guy said he's not had any probs with them unthreading so far, not too bad for £10, but I did get it fitted at my lbs as I didn't trust myself.

That looks good. Cheap too.

we sell these at work.
bearings are rough to say the least. spend the extra few quid and get it done properly.

we sell these at work.
bearings are rough to say the least. spend the extra few quid and get it done properly.

Yeah, it doesn't feel as smooth as the campy BB I had in it before but the frame isn't worth splashing the cash on getting the BB shell re-cut. Plus it's got a Sora chainset on it now which is ugly as sin.

If the bike is worth it, get the shell re-cut.

... Yeah, it doesn't feel as smooth as the campy BB I had in it before ...

in what way smooth? you mean the way the pedals spin or is there an issue with how it fits in the frame?

Fits fine, it's just it's a budget BB compared to the decent campy one that was in before but I only spent a tenner on it. As they say you get what you pay for.

Think it uses the same sealed bearings as you get in formula/system x Hubs, shame you can't swap them out for ceramic bearings and the like.

If you need a quick fix it's a good option but you will want a shimano compatible crankset as it only comes with a JIS taper.

Man things are so complicated. BB size, spindle length, threading, taper, theres so much hassle.

I looked a website that told me BB spindle size is largely dependant on the cranks you use (my BB shell is 68mm.

So I emailed Chain Reaction to ask them (I got some FSA Vero cranks super cheap in the flood sale) and they reply to say

"It is dictated by the frame to be honest. That said most dual ring chainsets would run a 108 or 113 spindle length."

Well thats great. But is it 108 or 113? That seems like a big difference (although its only 5mm).

How can I find out?

I think 110mm is the recommended length for FSA Vero cranks. Thats what I use anyway and the chain line looks fine to me...

If you want to get a decent threadless BB this is your best choice:
http://www.bikepro.com/products/bottom_brackets/mavic.shtml
You will need the BB shell faced but once installed they don't move.
The other big advantage for fixed riding is that they are adjustable so you can dial in your chainline.
I've got one on an old Bob Jackson and it runs very smoothly!
Mavic don;t make them anymore but they pop up on ebay from time to time.

I think 110mm is the recommended length for FSA Vero cranks. Thats what I use anyway and the chain line looks fine to me...

Thanks Buddha!

If you want to get a decent threadless BB this is your best choice:
http://www.bikepro.com/products/bottom_brackets/mavic.shtml
You will need the BB shell faced but once installed they don't move.
The other big advantage for fixed riding is that they are adjustable so you can dial in your chainline.
I've got one on an old Bob Jackson and it runs very smoothly!
Mavic don;t make them anymore but they pop up on ebay from time to time.

I looked for one of those when my threading first went but had no joy.

@nelson, I have a 110mm axle with shimano sora double and an On one fixed/fixed humb and it gives me a sweet chainline.