View Single Post
Old 08-11-17, 02:52 PM
  #12  
oldacura
Senior Member
 
oldacura's Avatar
 
Join Date: Nov 2006
Location: Lafayette, Colorado
Posts: 1,047

Bikes: 1998 Co-Motion Co-Pilot, 2015 Calfee Tetra

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 176 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
Thanks for the link. I've not heard of XXCycle. Are they US (or UK)? If not US it seems like shipping would be long & expensive. I assume that the standard small ring BCD is 74mm (not the 72mm I stated above).

I'll have to look at our setup this weekend. I recall that our chainring setup is as stated above but I need to verify.

Actually, shifting up & down in the front is fine - its just that the drop from bike to small in front is huge and I was trying to reduce the jump in front to a more incremental step in the rear. On my single bike I can pretty easily pedal up to about 18 mph on the small ring (39t). On our tandem, we pretty much run out of cadence about 15 mph on the small ring (34t).
oldacura is offline