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PostPosted: Thu May 30, 2013 8:58 pm 
Retro Guru
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Joined: Tue Jul 20, 2010 8:22 am
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Location: Warks
just wondering what the tolerances should be regarding equal clearance from crankarm to chain stays... I have an older bike with a cottered crankset and the non drive side is around 3 mm from arm to chain stay but more like 10 mm on the drive side... :roll:


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PostPosted: Thu May 30, 2013 9:14 pm 
Old School Grand Master
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Joined: Fri Oct 14, 2011 8:41 pm
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Location: Cumbria
Blimey, for some old cottered chainsets you had to take a taxi to get from the crank to the chainstay.........what's the chainline like?

Remember sometimes you had to have a lot of room for a chainguard and, god forbid, a chainbath.

Shaun


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PostPosted: Thu May 30, 2013 10:32 pm 
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Location: Warks
front 44, rear 42 ( 120 rear dropouts, 5 speed regina fw )


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PostPosted: Thu May 30, 2013 10:35 pm 
Old School Grand Master
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..........you lost me :)

Shaun


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PostPosted: Thu May 30, 2013 10:43 pm 
rBoTM Winner
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Are you thinking that the 3mm is a bit narrow? Replacing the spindle should be easy, once you find the right spindle. On the other hand old solid steel cranks should have very little flex.


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PostPosted: Thu May 30, 2013 10:56 pm 
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Midlife wrote:
..........you lost me :)

Shaun


you mean the measurements?

44 mm from centre of seat tube to middle of point between chainrings, rear as per http://sheldonbrown.com/chainline.html

is that the right way?


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