Retrobike Forum Index

It is currently Thu Dec 08, 2016 1:08 pm

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 5 posts ] 
Author Message
PostPosted: Wed Apr 14, 2010 4:40 pm 
Dirt Disciple

Joined: Tue May 27, 2008 6:30 pm
Posts: 87
I fancy getting some Stronglight 49D cranks. Can anyone tell me what length axle I'll need for the bottom bracket? I'll be running a single ring.
Cheers
Gareth


Top
 Profile  
 
 Post subject:
PostPosted: Wed Apr 14, 2010 5:32 pm 
King of the Skip Monkeys
King of the Skip Monkeys
User avatar

Joined: Wed Nov 07, 2007 4:34 pm
Posts: 26174
Location: Moomin Valley
whtever gives you best heel clearance without buggering the chainline


Top
 Profile  
 
 Post subject:
PostPosted: Wed Apr 14, 2010 5:45 pm 
Dirt Disciple

Joined: Tue May 27, 2008 6:30 pm
Posts: 87
Ah. Not an easy answer then!
Cheers
Gareth


Top
 Profile  
 
 Post subject:
PostPosted: Fri Apr 16, 2010 5:02 pm 
Old School Grand Master
User avatar

Joined: Wed Feb 20, 2008 12:21 pm
Posts: 5785
Location: Lost in Translation
Something around 110mm-ish should work, depending on required chainline, and tapers. I've had a few 49D cranks that seem to have quite a range of taper dimensions: some seemed happier on a Shimano (JIS) axle, while others seem closer to Campag. If you use a Campag taper, you'll need to compensate by increasing the length slightly.

Your best bet is to decide which taper seems the better option for the cranks you have, decide on the chainline you require, make a test-fit with an axle you have, measure the resulting chainline, then use that figure to make an educated guess about the ideal axle.

Sheldon has this diagram of a classic TA bottom bracket, with dimensions and suggested chainline, and the note: "Generally interchangeable with older Stronglight". That might give you a clue:

http://sheldonbrown.com/bbsize.html#ta


Top
 Profile  
 
 Post subject:
PostPosted: Fri Apr 16, 2010 5:20 pm 
rider | rBoTM Winner
rider | rBoTM Winner
User avatar

Joined: Fri Jan 25, 2008 1:42 pm
Posts: 5132
Location: Wakefield, Yorkshire
A TA double works with a 115 axle and a single is shorter. I have a couple of spare TA 115 axles.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: Markone and 19 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