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PostPosted: Wed Oct 24, 2007 9:10 pm 
Old School Grand Master
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Joined: Thu Jul 19, 2007 7:18 pm
Posts: 3798
Location: Staffordshire
I have always been a bit baffled about bottom brackets and chainsets. Is it an British thread, what width should the axle and shell be, is it low profile, etc, etc! I have always relied on taking the old one to the shop and buying another like it! Can't do that this time so some help would be greatly appreciated! My question is:

Will the chainset be fit OK on the bike? Will the front mech. (sorry Ed), fit onto the frame and will it shift the chain across the chainrings? Finally, what bottom Bracket will I need to join the whole thing together?

Ta very muchly.


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PostPosted: Wed Oct 24, 2007 9:28 pm 
B.o.T.Y. Winner / Gold Trader
B.o.T.Y. Winner / Gold Trader
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Joined: Thu Oct 27, 2005 11:00 am
Posts: 5215
Location: York
Response fromt tother thread :arrow:


retrobikeguy wrote:
You need an endless clamp version like on my kestrels, they normally come with a band that slots the back where the allen head is but you dispose of that and use a 'shaped' bolt that fits snug an the bach of the plate.

Image

Image


So no - the front mech in your picture wont fit.


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PostPosted: Wed Oct 24, 2007 10:16 pm 
Gold Trader / PoTM Winner / RB Rider
Gold Trader / PoTM Winner / RB Rider
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Joined: Wed Oct 05, 2005 7:45 pm
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Location: kent
you are going to need a long BB , 127mm I d say .
the BB you have at the moment is probably shorter , as older cranks were straight , and not bended like newer models .

for the front mech , cant you bolt it onto the plate which is welded on the frame ?


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PostPosted: Wed Oct 24, 2007 10:28 pm 
B.o.T.M. Winner / Feature Bike
B.o.T.M. Winner / Feature Bike
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Joined: Tue Dec 13, 2005 3:26 pm
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Location: Tilting at windmills and shouting at the rain.
Because it's an e-stay you won't need to go mad on the length as there are no chainstays for the rings to foul on, standard 500lx used a 122.5mm so you should be able to get away with anything between 117mm and 122.5mm.

and you'll need the endless band not the braze on mech


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PostPosted: Wed Oct 24, 2007 10:36 pm 
Old School Grand Master

Joined: Wed Jun 29, 2005 11:18 am
Posts: 15804
Location: near cwmcarn
this is 1 of the reasons OEM like the new thru axle style cranks, same length axle, fits 73mm shell or add a few spacers for 68mm. (I dont currently use a thru axle crank, just saying for info sake :)
i fully appreciate how much of a nitemare this can be! theres just so many variations of crank makes requiring different axle lengths.. theres never any guarentee re axle length until its all built up.. then its a case of.. BOLX! need a shorter/longer BB :roll: :lol:


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PostPosted: Sun Oct 28, 2007 5:00 pm 
Old School Grand Master
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Joined: Thu Jul 19, 2007 7:18 pm
Posts: 3798
Location: Staffordshire
retrobikeguy wrote:
Response fromt tother thread :arrow:


retrobikeguy wrote:
You need an endless clamp version like on my kestrels, they normally come with a band that slots the back where the allen head is but you dispose of that and use a 'shaped' bolt that fits snug an the bach of the plate.

Image

Image


So no - the front mech in your picture wont fit.


Thanks for the advice. Now, does anyone have one of these beasts for sale? I've had a nightmare sunday, stuck in the house with the snot twins. I could do with cheering up!


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PostPosted: Sun Oct 28, 2007 7:14 pm 
Retro Guru
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Joined: Mon Jul 31, 2006 3:07 pm
Posts: 2044
Mmmmm black XT.
My twins are 7 and there is still snot.
Tissues allways at hand (for snot).


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PostPosted: Sun Oct 28, 2007 9:12 pm 
jammy git
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Joined: Sat Dec 10, 2005 4:18 pm
Posts: 1073
Location: Thatcham, Berkshire
Ahhh, you need the endless clip model, ditch the band and craft a bit of aluminium with a threaded hold to sit snuggly behind the frame braze-on.....you'll find that the bolt supplied won't be long enough (if anyone has a supply of proper longer bolts for this application please let me know!)....I have the correct XT front mech for mine, the curved aluminium bit but no bolt :(

Cheers
Stu


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PostPosted: Wed Oct 31, 2007 8:02 pm 
Retro Guru
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Location: Isle of Wight, UK
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