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

Thread Tools Search this Thread
Old 10-09-12, 09:22 AM   #1
Senior Member
Thread Starter
Join Date: Nov 2011
Posts: 128
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Convert fork mount to hold rear dropouts

Hi Folks --

I need some ideas on a simple way to convert a standard "truck bed" fork mount such as the picture below to hold the rear dropouts of a tandem with 145mm spacing. I see that 9mm works out to .354", so maybe some 3/8" all-thread (.375") would fit? Depends on how tight the tolerances are inside the fork mount. But with all-thread, there would be no quick-release, and it would be nice to have a quick release.

I could buy a replacement 145mm axle, but rear axles are 10mm, which is .394".

There are lots of fork mounts on the market, maybe someone knows one that would be easier than the others to convert.


Attached Images
File Type: jpg 00-1616-NCL-ANGLE.jpg (74.1 KB, 2 views)
WheelsNT is offline   Reply With Quote
Old 10-09-12, 12:29 PM   #2
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: 1,154
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Honestly, your easiest option may be the threaded rod.

Remove that 9mm QR. Run a drill down the QR bore and open it to 3/8". Pick up your length of threaded rod, 2 plain nuts, 4 wing nuts and 4 flat washers.

Mount the cut to length rod into the Bike Tight and secure with a plain nut on each side. On each stub end, install backwards a wing nut, a pair of washers and the second wing nut installed normal. Accomplish the same for the other side.

Use the wing nuts and washers to secure the dropouts. Almost QR but not quite.

PMK is offline   Reply With Quote
Old 10-09-12, 04:13 PM   #3
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: 1,926
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
I did the threaded rod thing for a quick fix but eventually bought a tandem quick release axle for easy in and out.
waynesulak is offline   Reply With Quote

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 01:33 AM.