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 Post subject: Raleigh seat clamp
PostPosted: Sun Feb 10, 2013 7:32 pm 
Devout Dirtbag

Joined: Tue Aug 28, 2012 11:54 am
Posts: 118
Location: Oxford
Hey everyone,

I've got a old raleigh frame which I'm currently using as a singlespeed commuter. The old seatpost bolt stripped so I cut it out, however the LBS didn't have a suitable replacement bolt so I just decided to use a standard allen bolt/nut with some washers either side, however it doesn't seem to keep the seatpost tight enough. Anyone got any solutions? The bike isn't anything special so I just want a solution that works effectively in stopping the seatpost from slipping down.

Is there any way to use a modern style clamp like this:

Image


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 Post subject: Re: Raleigh seat clamp
PostPosted: Sun Feb 10, 2013 7:48 pm 
Retro Guru

Joined: Tue Feb 02, 2010 6:11 pm
Posts: 1844
Location: wellingborough
any std nut and bolt that goes through the holes should tighten up enough to clamp it really


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 Post subject: Re: Raleigh seat clamp
PostPosted: Thu Feb 14, 2013 12:59 am 
Devout Dirtbag

Joined: Tue Aug 28, 2012 11:54 am
Posts: 118
Location: Oxford
I think the issue is that the eyelets which the bolt goes through are coming apart from the frame. It's a cheap gas pipe frame - anybody know of any cheap DIY solutions to get the seatpost secure?
Image


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 Post subject: Re: Raleigh seat clamp
PostPosted: Thu Feb 14, 2013 6:00 pm 
Dirt Disciple

Joined: Tue May 10, 2011 11:15 am
Posts: 53
Location: The Central Midlands
This is a cheap fix. Materials freely available from any UK roadside verge, recreation ground /park, outside any off-licence
A shim - namely a <strip of alloy cut from a drinks can>
Should sort it out!


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 Post subject: Re: Raleigh seat clamp
PostPosted: Thu Feb 14, 2013 8:18 pm 
Devout Dirtbag

Joined: Tue Aug 28, 2012 11:54 am
Posts: 118
Location: Oxford
I'm not sure there is enough clearance between the seatpost and the sides of the seatpost to get an piece of aluminium can in there - I assume this is what you mean?


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 Post subject: Re: Raleigh seat clamp
PostPosted: Thu Feb 14, 2013 9:19 pm 
Dirt Disciple

Joined: Tue May 10, 2011 11:15 am
Posts: 53
Location: The Central Midlands
zhang wrote:
I'm not sure there is enough clearance between the seatpost and the sides of the seatpost to get an piece of aluminium can in there - I assume this is what you mean?


Your seat collar lugs look like they are too closed together, using a suitable lever prise apart so the internal faces are roughly parallel. Then try the shim. All the shim needs is to be almost the circumference of the post and maybe 3-4cm deep. Make sure it protrudes from the seat-tube slightly before fitting the post, trim the shim / cut out a bigger shim if necessary. Good luck!


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 Post subject: Re: Raleigh seat clamp
PostPosted: Fri Feb 15, 2013 7:25 pm 
Devout Dirtbag

Joined: Tue Aug 28, 2012 11:54 am
Posts: 118
Location: Oxford
I think it worked! Thanks for the advice.


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