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PostPosted: Wed Jul 31, 2013 3:28 pm 
retrobike rider
retrobike rider

Joined: Sun Sep 23, 2007 11:22 pm
Posts: 7306
Location: Hove
They had used 26.4 posts previously, but that was when their seat tubes were ED28.6. For the P7 and C16R they went over to ED31.8 seat tubes as a design feature in the interests of greater stiffness there. They could have used a 29.8 or 30.0 post, but they weren't in great supply in those days and anyway were much heavier than a 26.4 (and it is a steel post I seem to recall). Orange were far from alone in using shims when designing a frame with a 31.8 seat tube. e.g., all USE posts were designed to be used with a shim.


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PostPosted: Wed Jul 31, 2013 5:10 pm 
Retro Guru

Joined: Sat Jun 26, 2010 11:07 pm
Posts: 1901
Location: brighton
Aah that explains it, nice one thanks Anthony. Sorry if my previous post sounded a bit off - unintentional I can assure you! I just like to get to the bottom of these things :-)


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PostPosted: Mon Aug 19, 2013 9:07 pm 
Retro Guru

Joined: Sat Jun 26, 2010 11:07 pm
Posts: 1901
Location: brighton
Quick update for anyone interested. I spotted a NOS Kalloy 29.8 seatpost on eBay (quite a rare size) and picked it up for a tenner so I decided to try and get the shim out after all.

As Paddy suggested I equipped myself with a flat-head screwdriver and, for good measure, a big old chisel that had no edge to it anyway. Wasn't getting far with the screwdriver and thought if I could get theend of the chisel into the notch on one side and the side of it into the other notch I could get some leverage for twisting the shim.

Well whadyeknow! It wasn't fused after all and started to twist. Eventually I got enough to grip with plyers and the rest is history!

Seatpost fits a treat and its mahoosive so I'm thinking this bike might fit me after all :-)

Here's some pics

Shim part way out
Image

Then I remembered to get a shot with the chisel (obviously by then it was no longer needed)
Image

Twisting it out with plyers (in case you just couldn't imagine what that might look like ;-) )
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And it's out!
Image

Seatpost almost as long as seat tube!

Image

And it is up to min insert - you can see the grease line
Image


Last edited by jaypee on Wed Aug 21, 2013 5:21 pm, edited 1 time in total.

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PostPosted: Mon Aug 19, 2013 9:13 pm 
Retro Guru
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Joined: Sat Mar 24, 2012 10:45 pm
Posts: 542
Well done :mrgreen:

Oh.... and your 'work bench' looks like a tramps bed :shock:


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PostPosted: Mon Aug 19, 2013 9:24 pm 
Retro Guru

Joined: Sat Jun 26, 2010 11:07 pm
Posts: 1901
Location: brighton
Haha that one's kept in the loft for now - not ideal for working on but out of the way. And yes I am planning on sorting the loft out....... one day... ;-)


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PostPosted: Sat Aug 24, 2013 1:04 am 
Retro Guru

Joined: Sat Jun 26, 2010 11:07 pm
Posts: 1901
Location: brighton
And in all its glory.

viewtopic.php?f=6&t=269015&p=2010642#p2010642

The bulge disappeared when the shim came out.


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PostPosted: Tue Sep 30, 2014 1:14 pm 
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Joined: Mon Jul 26, 2010 10:46 am
Posts: 503
Location: Leamington, UK
I've been reading this with interest, and for anyone else with an Orange looking for a suitable post I found this bargain on the 'Bay: an Orange branded post of 29.8mm!

http://www.ebay.co.uk/itm/350961416970? ... EBIDX%3AIT


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