Child Stoker Kit on Co-Mo Speedster
#1
Junior Member
Thread Starter
Join Date: Aug 2007
Location: Ohio
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Child Stoker Kit on Co-Mo Speedster
Hi All:
We recently bought a 2003 Co-Motion Speedster to which we are trying to adapt a child stoker kit from our previous tandem. (Should have kept it just to ride with the youngest one, but don't need 3 in the garage) The bike has Ultegra cranks with 38T chainrings at 130mm BCD. There is just enough room to mount the inner 38T chainring that is driven by the stoker kit (or that drives the stoker ) but when the chain is attached it (the chain) rubs on the chainstay, just barely, but enough to scratch the paint. My fear is that this could eventually damage the frame slightly, or at a minimum, provide a place for rust to start.
Any suggestions on how to overcome this would be appreciated.
We recently bought a 2003 Co-Motion Speedster to which we are trying to adapt a child stoker kit from our previous tandem. (Should have kept it just to ride with the youngest one, but don't need 3 in the garage) The bike has Ultegra cranks with 38T chainrings at 130mm BCD. There is just enough room to mount the inner 38T chainring that is driven by the stoker kit (or that drives the stoker ) but when the chain is attached it (the chain) rubs on the chainstay, just barely, but enough to scratch the paint. My fear is that this could eventually damage the frame slightly, or at a minimum, provide a place for rust to start.
Any suggestions on how to overcome this would be appreciated.
#3
Certifiable Bike "Expert"
Join Date: May 2005
Posts: 5,647
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
If I understand correctly, you will need a longer bottom bracket spindle on the main (not kids') stoker crank. Maybe a longer BB on the kids' crank too for chainline's sake.
What kind of main stoker cranks and BB do you have?
What kind of main stoker cranks and BB do you have?
Thread
Thread Starter
Forum
Replies
Last Post
Paluc52
Tandem Cycling
4
01-17-16 11:23 PM