Phil, Check our website for a list of wheels that work with Sys 3. I've personally fitted the urS6 Avus, the urS4/S6 five spokes, and the Borbet Model Cs. Greg J BIRA.ORG >Phil Rose <pjrose at frontiernet.net> wrote: > >Are any of you with BIRA System 3 _also_ using 16" wheels?? If so, which ones? > >Phil >