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PostPosted: Thu Dec 16, 2010 10:03 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
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I have pretty much gathered the parts in preparation for the build but am un sure of the seatpost size for this one, It a 1989 531 C-Luxe from the lightweight division, pic of actual frame below

Cheers

GM 8)

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PostPosted: Thu Dec 16, 2010 10:24 pm 
Retro Guru
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I've got a '92 Raleigh with a 531 frame and the seatpost is 27.0mm, if that helps. It depends on the gauge of the tubes, because some 531 frames use a 27.2mm seatpost.


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PostPosted: Thu Dec 16, 2010 10:33 pm 
retrobike rider / Gold Trader
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Cool thanks Jonny, My dad has a old Kona with a 27.0 seatpost so will see if it fits in the hole :lol:


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PostPosted: Thu Dec 16, 2010 11:21 pm 
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I think 27.2 will be more likely. Both my Raleighs in 531 had that size.

Mark.


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PostPosted: Fri Dec 17, 2010 10:08 am 
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Tony Oliver in his book said that the actual fit is 27.4, but usually some distortion during brazing occurred and so 27.2 was typical.


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PostPosted: Fri Dec 17, 2010 2:10 pm 
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All of mine are 27.2, but it is variable and could be 27.0 or less.

Sorry, not much help I'm afraid!


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PostPosted: Fri Dec 17, 2010 3:41 pm 
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What a nightmare! How is anyone supposed to find out the correct size? My old Evans in 531 had 27.0 but I only know that because that's what they told me when I bought it. Otherwise I probably would have shoved a 27.2 in it. Is it just a case of trying different ones until you find one that feels just right? Sounds like I might need a collection of old cheap seatpins if I start buying up old frames.


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PostPosted: Fri Dec 17, 2010 4:48 pm 
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Digital calipers work for me.
They were selling them for a pittance at LIDL, alternatively how about the LBS?
My mid 80's Raleigh Record Ace 531C I seem to remember had a 27.2 post. Weren't the singled butted 531 frame 26.4 & 26.8 and the rest 27.0 or 27.2


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PostPosted: Fri Dec 17, 2010 9:50 pm 
retrobike rider / Gold Trader
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Thanks for all your suggestions chaps, I have both these sizes and I will try at the weekend and let you know the result.

Cheers 8)


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PostPosted: Fri Dec 17, 2010 11:29 pm 
retrobike rider
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I've owned a few 80's Raleigh 531 and 653 frames, all were 27.2


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