Retrobike Forum Index

It is currently Thu Dec 08, 2016 1:36 am

* Login   * Register * Search  * FAQ

Forum rules


**Classified Rules & Guidance - Feedback - Dispute Procedure - Gold Trader Status - All Adverts Need A Price - 5 Adverts Maximum - Leave Prices In Sold Adverts - No cross posting adverts**



Post new topic Reply to topic  [ 26 posts ]  Go to page 1, 2, 3  Next
Author Message
PostPosted: Mon Aug 05, 2013 3:19 pm 
Retro Guru

Joined: Mon Oct 10, 2011 2:16 pm
Posts: 418
A per the title.

Campag 8 speed rear cassette 12-23. Came on a bike i recently bought but i need a higher ratio for the hills else would of kept it. i can't vouch for mileage however the bike was hardly ridden and the rets of it is in great nick. Also i'm not sure which campag model? It has got the ratios marked up on the rings and c's plus diamonds? might well be campag standard but i'm not sure just trying to be helpful. when i used it it worked a1. I am including the sram pc830 chain with including split pin. £15 posted please.

3t quill stem in great nick apart from some marking on the front side (see pics) PLEASE note this is only just above the min insertion mark so for most people won't be seen. I already have the same model on my bike so no need for it. £20 posted please.

Wheel skewers again no longer required. I was sold them as being Mavic's however on reflection i think mavic would be written on them? no the less their good quality £12 posted.

Any questions please ask, collection welcome save postage costs (based in north devon).
thanks jon

https://www.dropbox.com/sc/sooiv8a7q3arko0/NAa3r_EzLv


Top
 Profile  
 
PostPosted: Mon Aug 05, 2013 9:03 pm 
Retro Guru

Joined: Sat Jul 14, 2012 8:23 pm
Posts: 973
Location: Kent, UK
PM sent about the cassette & chain...


Top
 Profile  
 
PostPosted: Tue Aug 06, 2013 8:46 pm 
Retro Guru
User avatar

Joined: Mon Mar 26, 2012 5:21 pm
Posts: 589
Sounds like your cassette is a mix of Exa Drive and pre-Exa Drive sprockets.

The "c" in a diamond indicates where the thinner spline is on Exa Drive sprockets; these sprockets will say, for example, "12A" or "12B": the letter indicating which sprockets can be combined together in a cassette.

The pre-Exa Drive sprockets just state "12" or "13" and have the letters "A" to "H" written above the splines, which are all the same size.

Exa Drive sprockets can be used on pre-Exa Drive freehubs, but pre-Exa Drive sprockets can only be used on pre-Exa Drive freehubs.

This page has more info.


Top
 Profile  
 
PostPosted: Tue Aug 06, 2013 10:40 pm 
Retro Guru

Joined: Mon Oct 10, 2011 2:16 pm
Posts: 418
Wow that's a lot to get your head around :shock: . Thanks for the link I will look it up tomorrow. I have uploaded pics for the guy to identify if it's what he needs thanks Jon


Top
 Profile  
 
PostPosted: Tue Aug 06, 2013 11:07 pm 
Retro Guru

Joined: Mon Oct 10, 2011 2:16 pm
Posts: 418
Just to update the Skewers are apparently of a set of mavic askium


Top
 Profile  
 
PostPosted: Tue Aug 06, 2013 11:22 pm 
Retro Guru

Joined: Sat Jul 14, 2012 8:23 pm
Posts: 973
Location: Kent, UK
ScillySuffolk wrote:
Sounds like your cassette is a mix of Exa Drive and pre-Exa Drive sprockets.

The "c" in a diamond indicates where the thinner spline is on Exa Drive sprockets; these sprockets will say, for example, "12A" or "12B": the letter indicating which sprockets can be combined together in a cassette.

The pre-Exa Drive sprockets just state "12" or "13" and have the letters "A" to "H" written above the splines, which are all the same size.

Exa Drive sprockets can be used on pre-Exa Drive freehubs, but pre-Exa Drive sprockets can only be used on pre-Exa Drive freehubs.

This page has more info.


I'm not sure how this conclusion was reached just based on the three present Dropbox pics? Therefore, can you post pics of every cog please? A mix of pre and exa-drive cogs isn't much use, so would like to see exactly what's what to be sure before reaching a decision... I'm after an exa-drive cassette, and pre exa drive will not fit the freehub body.

Thanks buddy


Top
 Profile  
 
PostPosted: Wed Aug 07, 2013 7:00 am 
Retro Guru

Joined: Mon Oct 10, 2011 2:16 pm
Posts: 418
Ok will do it's a tough crowd ;-)


Top
 Profile  
 
PostPosted: Wed Aug 07, 2013 12:29 pm 
Retro Guru
User avatar

Joined: Mon Mar 26, 2012 5:21 pm
Posts: 589
My conclusion was based on just one of the photos, the OP's statement, reference to both types of cassette and twenty years experience of riding 8v Campag.

The photo shows the top sprocket is marked "12" and not "12a" or "12b": therefore it is pre-Exa Drive.

The OP stated that some of the sprockets have a "c" in a diamond, which is a feature of of Exa Drive only.


Top
 Profile  
 
PostPosted: Thu Aug 08, 2013 11:47 am 
Retro Guru

Joined: Mon Oct 10, 2011 2:16 pm
Posts: 418
I'm about to get pics sorted, all I know is the replacement record cassette I've fitted is exa drive (ultra drive) 8 speed.so in my limited pa brain knowledge I would of thought the spline would be the same? It's of a 90's steel olmo bike.if to get pics now


Top
 Profile  
 
PostPosted: Thu Aug 08, 2013 12:05 pm 
Retro Guru

Joined: Mon Oct 10, 2011 2:16 pm
Posts: 418
Pics now added I cannot do anymore. Writing underneath shows ring size and number with lettering.also whether a diamond symbol with a the letter c are inside it.thanks Jon


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 26 posts ]  Go to page 1, 2, 3  Next

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 24 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