Help with seat and down tube dimensions


New Member
Mar 7, 2008
Bellingham, WA
As we expand our kits ability to be mounted on the various frames with different tube diameters, I would really like some examples of down tube and seat tube diameters. We would like to start making retro fit kits for some of newer style frames. What I need from you is:

1. Seat tube diameter

2. Down tube diameter, if it is not round please provide both dimensions

Your assistance will be beneficial to all, even those that do not buy the shift kits as these retro fit kits will be useful for standard kits as well.