Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Tandem Cycling A bicycle built for two. Want to find out more about this wonderful world of tandems? Check out this forum to talk with other tandem enthusiasts. Captains and stokers welcome!

User Tag List

Reply
 
Thread Tools Search this Thread
Old 06-01-10, 11:52 PM   #1
martialman.45
Senior Member
Thread Starter
 
Join Date: Jul 2009
Bikes:
Posts: 324
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Timing chain

How do you know what spider needs adjusting when one of them is out of round? also how do you synch up the cranks? Just slip the chain up or down teeth? I've been using Sheldon Browns site for referance. Thanks everyone
martialman.45 is offline   Reply With Quote
Old 06-02-10, 06:24 AM   #2
TandemGeek
hors category
 
TandemGeek's Avatar
 
Join Date: Jan 2002
Bikes:
Posts: 7,210
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
How do you know what spider needs adjusting when one of them is out of round?

You don't, so you just start with one crank and get the chain tension as even as you can, and then move on to the second one for additional fine tuning.

How do you synch up the cranks? Just slip the chain up or down teeth?

That's pretty much what you do, i.e., loosen the eccentric so that you can rotate it to create enough chain slack to remove the sync chain and then slip the chain one set of links at a time, rotate the eccentric (but don't tighten it just yet) to check your alignment until you get the desired crank phasing. Once you get comfortable working on the tandem you can leave just enough slack in the sync chain so that you can derail it by hand without loosening the eccentric. See video below. Warning: If you don't have enough slack in the sync chain (about 3/4"), you'll run the risk of getting your hand too close to the timing ring's teeth, and bad things happen when fingers get caught between a tight chain and sprockets.
TandemGeek is offline   Reply With Quote
Old 06-02-10, 11:57 PM   #3
martialman.45
Senior Member
Thread Starter
 
Join Date: Jul 2009
Bikes:
Posts: 324
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks TG, just as I figured. I have the chain tight, It wont come off by hand
martialman.45 is offline   Reply With Quote
Old 06-03-10, 12:50 PM   #4
ChrisM
Senior Member
 
Join Date: Dec 2004
Location: New Hampshire
Bikes: Road, FS mtn, SS mtn, cyclocross, fixie, folder
Posts: 52
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I've also removed one of the cranks to adjust sync, rather than loosening the eccentric.
ChrisM is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 03:39 PM.