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 02-12-14, 10:42 AM   #101
waynesulak
Senior Member
 
waynesulak's Avatar
 
Join Date: Jan 2008
Location: Ft Worth, TX
Bikes: 650B tandem converted from Santana Arriva, Santana Noventa, Boulder Bicycle 700C, Gunnar Sport, Trek TX700,
Posts: 1,927
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Are you concerned that the cable will cut the carbon?

Keep in mind that anything can be used for the block if cable lining is used. I switched to using cable lining from the down tube cable stop underneath all the way to the rear derailleur stop on my non-coupled tandem. This keeps the cable clean and shifting is great. You could use liner from the down tube stop under the eccentric to the cable break.


http://www.universalcycles.com/shopp...902&category=7
Attached Images
File Type: jpg 41902.jpg (17.7 KB, 9 views)
waynesulak is offline   Reply With Quote
Old 02-12-14, 07:50 PM   #102
chojn1
Senior Member
Thread Starter
 
chojn1's Avatar
 
Join Date: Jun 2009
Location: Sugar Land, TX
Bikes: Eriksen Tandem, DIY CF Tandem, Aluminum Tandem, Lightspeed, Cervelo, Specialized, Trek
Posts: 267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Wayne,

I am a little concerned. But the guides are detachable and easily replaced with an alternate design.
Here they are:


The ones with the parallel groves is for the front eccentric, the other for the back bb. The concave side of these guides conform perfectly to the bottom of the bike frame (I used the frame itself for the mold). So, they should go on perfectly with double sided tape. The tension of the cables will help hold them in place. They are easily removable should I decide to change the design. I will definitely add the cable lining if needed.

Build out starts tomorrow. I'm so excited!
Attached Images
File Type: jpg Cable Guide.jpg (92.8 KB, 41 views)

Last edited by chojn1; 02-13-14 at 09:31 AM.
chojn1 is offline   Reply With Quote
Old 02-13-14, 10:40 PM   #103
chojn1
Senior Member
Thread Starter
 
chojn1's Avatar
 
Join Date: Jun 2009
Location: Sugar Land, TX
Bikes: Eriksen Tandem, DIY CF Tandem, Aluminum Tandem, Lightspeed, Cervelo, Specialized, Trek
Posts: 267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)


Build out is progressing well. I've decided just to use some spare components I have around. It is set up as a hybrid/mountain tandem which has the advantage of allowing me to test the frame structure on a mountain bike trail near my house. There will be no stoker in the first few rides, but the course will give the frame plenty of other challenges.

Once I get around to upgrading my other tandem to DI2, this frame may inherit the Ultegra road group.
Attached Images
File Type: jpg On the stand.jpg (110.2 KB, 74 views)

Last edited by chojn1; 02-14-14 at 10:44 PM.
chojn1 is offline   Reply With Quote
Old 02-13-14, 10:51 PM   #104
chojn1
Senior Member
Thread Starter
 
chojn1's Avatar
 
Join Date: Jun 2009
Location: Sugar Land, TX
Bikes: Eriksen Tandem, DIY CF Tandem, Aluminum Tandem, Lightspeed, Cervelo, Specialized, Trek
Posts: 267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Cable guides
Attached Images
File Type: jpg rear guide.jpg (95.0 KB, 28 views)
File Type: jpg Front guide.jpg (83.5 KB, 39 views)

Last edited by chojn1; 02-14-14 at 10:43 PM.
chojn1 is offline   Reply With Quote
Old 02-20-14, 12:54 PM   #105
chojn1
Senior Member
Thread Starter
 
chojn1's Avatar
 
Join Date: Jun 2009
Location: Sugar Land, TX
Bikes: Eriksen Tandem, DIY CF Tandem, Aluminum Tandem, Lightspeed, Cervelo, Specialized, Trek
Posts: 267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
The bike is essentially complete. I did manage to get in about 30 miles over the weekend, ten of which was on a mountain bike trail. I did a few bunny hops and a couple of foot deep drops but didn't work up the nerve for any major jumps. The Chris King Headset was a little loose which has since been corrected with a new compression bolt. There was also a dragging noise in the back which has resolved with a longer rear derailleur cable and housing. Now if I could only get the brake levers from rattling after every jumps, the bike would be good to go. I was worried about the exposed cables and the open cable guides, but they held despite all my attempts at flexing the frame.

The bike is very smooth on pavement for which it is intended. Shifting from the X0 derailleurs and handle bar twist shifts is amazing (from any chain ring to any cog)- much better than even the Dura Ace STI's. The Bengal brakes are efficient as expected. The frame ride stiff with no detectable flex, and no complaint heard from the couplers. I am having so much fun with this thing, it will probably never see the road groupset. The wife was impressed enough to jump on for a short ride around the neighborhood.

Now for some bike riding time.

Attached Images
File Type: jpg 20140220_bike.jpg (104.7 KB, 102 views)

Last edited by chojn1; 02-20-14 at 01:04 PM.
chojn1 is offline   Reply With Quote
Old 02-20-14, 08:33 PM   #106
reburns
Senior Member
 
Join Date: Apr 2012
Bikes:
Posts: 136
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
I want one!
reburns is offline   Reply With Quote
Old 02-21-14, 01:31 PM   #107
colotandem 
Senior Member
 
colotandem's Avatar
 
Join Date: Oct 2007
Location: Golden, CO
Bikes: n+1
Posts: 329
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Quote:
Originally Posted by chojn1 View Post
The bike is essentially complete. I did manage to get in about 30 miles over the weekend, ten of which was on a mountain bike trail. I did a few bunny hops and a couple of foot deep drops but didn't work up the nerve for any major jumps. The Chris King Headset was a little loose which has since been corrected with a new compression bolt. There was also a dragging noise in the back which has resolved with a longer rear derailleur cable and housing. Now if I could only get the brake levers from rattling after every jumps, the bike would be good to go. I was worried about the exposed cables and the open cable guides, but they held despite all my attempts at flexing the frame.

The bike is very smooth on pavement for which it is intended. Shifting from the X0 derailleurs and handle bar twist shifts is amazing (from any chain ring to any cog)- much better than even the Dura Ace STI's. The Bengal brakes are efficient as expected. The frame ride stiff with no detectable flex, and no complaint heard from the couplers. I am having so much fun with this thing, it will probably never see the road groupset. The wife was impressed enough to jump on for a short ride around the neighborhood.

Now for some bike riding time.

Very cool! I think you will find that there are a lot of people on this forum that are very jealous of your handywork (including me)!
colotandem is offline   Reply With Quote
Old 02-22-14, 05:50 AM   #108
PMK
Senior Member
 
PMK's Avatar
 
Join Date: May 2008
Location: Royal Palm Beach, Florida
Bikes: 2006 Co-Motion Roadster (Flat Bars, Discs, Carbon Fork), Some 1/2 bikes and a couple of KTM's
Posts: 1,155
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Awesome to see completed. Since we also run flat bars and XO 9sp, I can relate to leaving drop bars and road group on the shelf.

PK
PMK is offline   Reply With Quote
Old 02-22-14, 09:30 AM   #109
waynesulak
Senior Member
 
waynesulak's Avatar
 
Join Date: Jan 2008
Location: Ft Worth, TX
Bikes: 650B tandem converted from Santana Arriva, Santana Noventa, Boulder Bicycle 700C, Gunnar Sport, Trek TX700,
Posts: 1,927
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
The bike looks great. Thanks for sharing the build process.
waynesulak is offline   Reply With Quote
Old 02-24-14, 07:32 AM   #110
chojn1
Senior Member
Thread Starter
 
chojn1's Avatar
 
Join Date: Jun 2009
Location: Sugar Land, TX
Bikes: Eriksen Tandem, DIY CF Tandem, Aluminum Tandem, Lightspeed, Cervelo, Specialized, Trek
Posts: 267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Thanks guys,

It has been an intellectually stimulating and productively gratifying experience.
Of course, I could not have done it without your help.
I am still amazed at the power of the internet.
One can start from zero, research the necessary information, teach himself the technical skills, ask advice from experts, and create almost anything.
Now I have a cool bike I built to ride.
But, I also have the ability and confidence to tackle more complex projects.
Thanks again.
CJ
chojn1 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 11:05 AM.