The Club

The League's Clubhouse
It is currently Tue Apr 24, 2018 7:59 am

All times are UTC [ DST ]




Post new topic Reply to topic  [ 5 posts ] 
Author Message
 Post subject: Fixie chainlines.
PostPosted: Mon Sep 05, 2011 4:00 pm 
Offline
Incorrigible Member

Joined: Sat Sep 24, 2005 4:39 am
Posts: 1550
Location: In the shed.
I'm knocking up a winter hack, and there's enough spares in the shed to do it on the cheap as a fix if I buy a set of spokes and a sprocket......
The rear hub is a 126mm oln Campag, which I can re-space to 135 - solid axle so no bother. An old bottom bracket lockring either side of the sprocket will make a spacer & hold it in place with a bit of threadlock. It'll be running a back brake so I'm not too worried about the sprocket coming undone.
There's a selection of old UNXX bottom bracket cartridges in the scrapbin. Rear dropouts are 135mm.
So, what chainline measurement do I need to look at from the frame centreline to the chainring/sprocket?

(Never done a fix before, triple touring rigs aren't that critical!). :-k

_________________
I'll think about a sig when I'm sober!


Top
 Profile  
 
 Post subject: Re: Fixie chainlines.
PostPosted: Mon Sep 05, 2011 8:05 pm 
Offline
Man of the Chair
User avatar

Joined: Fri Sep 23, 2005 4:14 pm
Posts: 2762
Location: In a secret lab beneath the Tower of Fettle...
Y'know, I've never been over critical, but I am in the barbarous minority (and my chain grobbles cheerfully where others whisper).

What position are you running the chainring in? The hack classic moves the big ring to the middle ring position, and the chainline more or less just works.

_________________
Borrowing momentum from the future!
OpenStreetMap UK & Ireland Streetmap & Topo: www.ravenfamily.org/andyg/maps (updated weekly)


Top
 Profile  
 
 Post subject: Re: Fixie chainlines.
PostPosted: Tue Sep 06, 2011 12:02 pm 
Offline
Incorrigible Member

Joined: Sat Sep 24, 2005 4:39 am
Posts: 1550
Location: In the shed.
That I've heard of, but the scrap box has 1/2 a dozen bottom bracket cartridges of different length, for 107 off a mountain bike with built in front mech to 127 from an old 6 speed triple tourer.
I'll just have to play around and see what fits I suppose.
Chainsets, there's a Stronglight 100, a couple of old Sakae compacts (who said compacts were new??) and a TA which I don't (yet) have a b/b for, the taper's different to Jap stuff.

_________________
I'll think about a sig when I'm sober!


Top
 Profile  
 
 Post subject: Re: Fixie chainlines.
PostPosted: Tue Sep 06, 2011 7:53 pm 
Offline
Man of the Chair
User avatar

Joined: Fri Sep 23, 2005 4:14 pm
Posts: 2762
Location: In a secret lab beneath the Tower of Fettle...
Your scrap box is as big as my shed!

_________________
Borrowing momentum from the future!
OpenStreetMap UK & Ireland Streetmap & Topo: www.ravenfamily.org/andyg/maps (updated weekly)


Top
 Profile  
 
 Post subject: Re: Fixie chainlines.
PostPosted: Wed Sep 07, 2011 8:46 am 
Offline
Incorrigible Member

Joined: Sat Sep 24, 2005 4:39 am
Posts: 1550
Location: In the shed.
:oops: It should be, I've been cycling as an adult since 1977! :oops:

_________________
I'll think about a sig when I'm sober!


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group