Retrobike Forum Index

It is currently Wed Dec 07, 2016 7:57 pm

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 7 posts ] 
Author Message
PostPosted: Fri Dec 17, 2010 6:56 pm 
Retro Guru
User avatar

Joined: Sat Dec 16, 2006 7:51 am
Posts: 1281
Location: Norfolk
Do they even exist??? I'm seriously considering buying a Planet X Kaffenback frame as a winter road bike, cyclo cross and light tourer. The Kaffenback doesn't have bosses for downtube shifters, and -- due to funds -- I wouldn't be able to afford expensive STI or Ergo levers. However, I have a few sets of downtube shifters and I was wondering if I could some how fit them onto the downtube with some kind of clamp that has the bosses. Like 70's road bikes had band-on downtube bosses.

I know you can get "Pauls Thumbies" for donwtube shifters that mount on the handlebar n' all, but they're expensive too (£45 - 50).


Top
 Profile  
 
 Post subject:
PostPosted: Fri Dec 17, 2010 7:21 pm 
Retro Guru
User avatar

Joined: Sat Sep 22, 2007 12:23 pm
Posts: 747
Location: NEW FOREST HANTS
how come you cant use some from a 70s roadbike?


Top
 Profile  
 
 Post subject:
PostPosted: Fri Dec 17, 2010 7:39 pm 
Retro Guru
User avatar

Joined: Sat Dec 16, 2006 7:51 am
Posts: 1281
Location: Norfolk
retrowagen1234 wrote:
how come you cant use some from a 70s roadbike?


The DT on the Kaffenback might be a bit fat - there are some variations on modern steel tube diameters. I'll have to email Planet X to ask them the tubing diameter. 70s road bikes have quite skinny DT's, f.e. Reynolds 531 downtubes typically measure 28.6mm.


Top
 Profile  
 
 Post subject:
PostPosted: Fri Dec 17, 2010 8:46 pm 
Onnnne Huuuunnnndrreeed and Eigggghhhhty

Joined: Sun May 16, 2010 8:50 pm
Posts: 180
Location: North Yorkshire
Can you maybe mod an old set of friction clamp-ons? I'm guessing that stem mounted shifters or gripshifts right up on the flats aren't options? Granted, it'd look a bit weird, but it'd be cheap...


Top
 Profile  
 
 Post subject:
PostPosted: Fri Dec 17, 2010 8:58 pm 
Retro Guru
User avatar

Joined: Sat Sep 22, 2007 12:23 pm
Posts: 747
Location: NEW FOREST HANTS
Can you weld? Get an old steel clamp on set, Cut it down the middle and weld a piece in to make it wider . Grind, Paint. done... :D Would cost as much as an inch of welding wire to do...


Top
 Profile  
 
 Post subject:
PostPosted: Fri Dec 17, 2010 9:21 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 8212
Location: New Forest, UK
See the thread on retro MTB about bar-end shifters - there are some neat Jagwire wotsits to turn downtube levers into barcons.. 8)


Top
 Profile  
 
 Post subject:
PostPosted: Fri Dec 17, 2010 11:23 pm 
Retro Guru

Joined: Tue Feb 23, 2010 1:56 pm
Posts: 1032
Location: West Yorkshire
It does look like the downtube is bit fat even though the seat tube is old school 28.6mm. I'm sure they'll tell you when you email them. The other alternative is a 2nd hand oldie or not so oldie with bosses of course.

Mark.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: glpinxit, keithglos, Midlife, mydadscondor, Yahoo [Bot] and 21 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