Retrobike Forum Index

It is currently Sun Dec 04, 2016 9:19 am

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 25 posts ]  Go to page Previous  1, 2, 3  Next
Author Message
PostPosted: Sat Feb 16, 2013 9:53 am 
South East Deputy AEC
South East Deputy AEC
User avatar

Joined: Mon Feb 22, 2010 7:27 pm
Posts: 4397
Location: Angmering
Ace, thank you. I've got a GT one on there at the moment, but its not quite right


Top
 Profile  
 
PostPosted: Sun Feb 17, 2013 7:12 pm 
Dirt Disciple

Joined: Fri Mar 30, 2012 5:08 pm
Posts: 54
Location: Wiltshire
...so I whipped the seat clamp off and measure the top of the seat tube, and it seems to be exactly 33mm.

Interestingly, I found that I had at some stage needed to put a shim inside my clamp, which is not the original item. Maybe I'll get a new clamp, now I don't need the cable stop for cantis.


Top
 Profile  
 
PostPosted: Thu Feb 21, 2013 9:10 am 
South East Deputy AEC
South East Deputy AEC
User avatar

Joined: Mon Feb 22, 2010 7:27 pm
Posts: 4397
Location: Angmering
hmmm, interesting.

So I now have a dilemma, as this seems to be a rare size indeed...

31.8 and widen it a bit, or 34.9 and tighten it a lot?


Top
 Profile  
 
PostPosted: Thu Feb 21, 2013 9:31 am 
Dirt Disciple

Joined: Fri Mar 30, 2012 5:08 pm
Posts: 54
Location: Wiltshire
BobCatMax wrote:
hmmm, interesting.

So I now have a dilemma, as this seems to be a rare size indeed...

31.8 and widen it a bit, or 34.9 and tighten it a lot?

Indeed, it does appear to be a strange size. I measured it across the fore-and-aft and 'athwartships' axes, just to be certain.

In my case, the shim I'm using appears to be about 0,5mm thick Au sheet, which would imply an increase of roughly 1mm, which suggests that the internal diameter of my clamp is most likely to be 34,9.

I'll happily re-measure it if you like, including the non-compressed internal diameter of the clamp, to be certain.

What I can say is that it's been like that since (ISTR) around 1996 and I've never had any problems with it at all. Until I opened it up the other day I wasn't even aware that there was a shim in there!

btw... Post some pictures of your 8000, please! I'm still curious about why these apparently very good bikes appear to be so uncommon or to have so little kudos.


Top
 Profile  
 
PostPosted: Thu Feb 21, 2013 9:44 am 
South East Deputy AEC
South East Deputy AEC
User avatar

Joined: Mon Feb 22, 2010 7:27 pm
Posts: 4397
Location: Angmering
I think you're right, the 34.9 does seem to be the more sensible option.

I'll get one ordered from CRC this morning :)

Mine is a 7000, i think

summer shoes
Image

winter commuting duties
Image


Top
 Profile  
 
PostPosted: Thu Feb 21, 2013 11:59 am 
Dirt Disciple

Joined: Fri Mar 30, 2012 5:08 pm
Posts: 54
Location: Wiltshire
BobCatMax wrote:
I think you're right, the 34.9 does seem to be the more sensible option.

I'll get one ordered from CRC this morning :)

Mine is a 7000, i think

Very nice! I think it probably is a 7000, mine has a different fork. Yours appears to have straight legs.

Is that a fixie or singlespeed setup? What ratios?


Top
 Profile  
 
PostPosted: Thu Feb 21, 2013 2:08 pm 
South East Deputy AEC
South East Deputy AEC
User avatar

Joined: Mon Feb 22, 2010 7:27 pm
Posts: 4397
Location: Angmering
It's a Kona Project 2 fork on the front, which is why it's straight. It's a bitsa build, so very little matches or is original.

set up as an SS on a 42x17. Just about acceptable for the coastal westerly wind down here


Top
 Profile  
 
PostPosted: Fri Feb 22, 2013 7:54 pm 
South East Deputy AEC
South East Deputy AEC
User avatar

Joined: Mon Feb 22, 2010 7:27 pm
Posts: 4397
Location: Angmering
Hehe, it arrived this morning, Tim.

it's huge! not sure 2mm of coke can is gonna do it. We shall see tomorrow :)

enough of my pesky hijacking too ;)


Top
 Profile  
 
PostPosted: Fri Feb 22, 2013 8:01 pm 
Dirt Disciple

Joined: Fri Mar 30, 2012 5:08 pm
Posts: 54
Location: Wiltshire
BobCatMax wrote:
Hehe, it arrived this morning, Tim.

it's huge! not sure 2mm of coke can is gonna do it. We shall see tomorrow :)

enough of my pesky hijacking too ;)

Good luck with it. IMHO you're not hijacking. Post some pics of it in place!


Top
 Profile  
 
PostPosted: Thu Feb 28, 2013 7:22 am 
South East Deputy AEC
South East Deputy AEC
User avatar

Joined: Mon Feb 22, 2010 7:27 pm
Posts: 4397
Location: Angmering
Will get some pics later, but I thought I'd just say, coke can* shims FTW.

way way too big, a good few mm's i reckon. a double wrap of can, then folded over in half. so around a total of four complete revolutions. works like a charm

*other soft drink or alcoholic beverage** metal containers can be used in the production of this shim

** this would've been more appropriate


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 25 posts ]  Go to page Previous  1, 2, 3  Next

All times are UTC [ DST ]


Who is online

Users browsing this forum: bignick, severnthheathen, Sparrow, Tc, toomanyframes and 48 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:  

About Us

Follow Retrobike

Other cool stuff

All content © 2005-2015 Retrobike unless otherwise stated.
Cookies Policy.
bikedeals - the best bike deals in one place
FatCOGS - Fat Chance Owner's Group

Powered by phpBB® Forum Software © phpBB Group