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 Post subject: Chain comparability
PostPosted: Fri Mar 29, 2013 9:07 am 
Newbie

Joined: Fri Mar 29, 2013 8:55 am
Posts: 7
Hi, I've just become the proud owner of a Raleigh Banana. So I thought I had better sign up to RetroBike. My first question (probably of many) is-
I've had to order new wheels, and for easy servicing and parts have gone with some Shimano Tiagra hubs with an 8 speed freehub. Does anyone know of any compatability issues with new 8 speed chains and the old 'custom' chainrings on the bike?


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 Post subject: Re: Chain comparability
PostPosted: Fri Mar 29, 2013 10:27 am 
Dirt Disciple

Joined: Tue May 10, 2011 11:15 am
Posts: 53
Location: The Central Midlands
Bananarama wrote:
Hi, I've just become the proud owner of a Raleigh Banana. So I thought I had better sign up to RetroBike. My first question (probably of many) is-
I've had to order new wheels, and for easy servicing and parts have gone with some Shimano Tiagra hubs with an 8 speed freehub. Does anyone know of any compatability issues with new 8 speed chains and the old 'custom' chainrings on the bike?


3/32 pitch so any 7/8 speed chain will work.


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 Post subject: Re: Chain comparability
PostPosted: Fri Mar 29, 2013 11:21 am 
rBoTM Winner
rBoTM Winner
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Joined: Fri Nov 16, 2012 2:38 pm
Posts: 302
Location: West Dorset
Hi, welcome to the forum. You may need to check your rear dropout width as it's likely to be 126mm which will make an 8 speed freehub too wide (possibly 130mm?). You'll have to spread the rear stays out to 130mm, proceed with caution.

Martin


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 Post subject: Re: Chain comparability
PostPosted: Fri Mar 29, 2013 1:10 pm 
Newbie

Joined: Fri Mar 29, 2013 8:55 am
Posts: 7
Thanks Martin. Your right, 126mm. I'm sure I can pull it out 2mm either side.


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 Post subject: Re: Chain comparability
PostPosted: Fri Mar 29, 2013 1:38 pm 
rBoTM Winner
rBoTM Winner
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Joined: Fri Nov 16, 2012 2:38 pm
Posts: 302
Location: West Dorset
Bananarama wrote:
Thanks Martin. Your right, 126mm. I'm sure I can pull it out 2mm either side.


You can do that each time you fit the wheel yes, or if you're feeling brave you could do this -

http://sheldonbrown.com/frame-spacing.html

Martin


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 Post subject: Re: Chain comparability
PostPosted: Fri Mar 29, 2013 2:11 pm 
Old School Grand Master
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Joined: Fri Oct 14, 2011 8:41 pm
Posts: 8245
Location: Cumbria
Pulling the stiff rear triangle apart enough to slip in the wheel (remember you need to expand it a bit more so it slides in easilly) is a bit of a strain on the thumbs :(

Shaun


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 Post subject: Re: Chain comparability
PostPosted: Fri Mar 29, 2013 2:41 pm 
Newbie

Joined: Fri Mar 29, 2013 8:55 am
Posts: 7
Cold setting! Near suicide. I Invented sods law, so I'll give that a miss. What about an old axel, slowly and alternately unscrewing the cones to push the frame outwards?


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 Post subject: Re: Chain comparability
PostPosted: Fri Mar 29, 2013 3:01 pm 
Old School Grand Master
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Joined: Fri Oct 14, 2011 8:41 pm
Posts: 8245
Location: Cumbria
Newon's Law........only the weaker side of the triangle will move.

Shaun


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 Post subject: Re: Chain comparability
PostPosted: Fri Mar 29, 2013 3:02 pm 
rBoTM Winner
rBoTM Winner
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Joined: Fri Nov 16, 2012 2:38 pm
Posts: 302
Location: West Dorset
You could do that but you can't guarantee that you'll get even spread each side, one stay might be in the original place and the other side might push out by 4mm...


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 Post subject: Re: Chain comparability
PostPosted: Fri Mar 29, 2013 3:03 pm 
rBoTM Winner
rBoTM Winner
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Joined: Fri Nov 16, 2012 2:38 pm
Posts: 302
Location: West Dorset
Midlife wrote:
Newon's Law........only the weaker side of the triangle will move.

Shaun

Yeah...what he said! lol


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