Hi,Yes, this part has a universal mount to fit most brand cross bars.Thank youautopartstoys
They are about 18 inches long when folded down. Please let us know if you have any other questions. Sincerely, Modula Racks
Gee, I don't know; pretty high. Load from a ladder? You may also need one of Rhino's adapting hardware kits to lock the J-cradle(s) into your existing racks.You can always try the J-cradle(s) and return if it/they don't work for you. I think I paid $10 or $20 for return shipping, but otherwise I was completely refunded.
I think it would. My cross bars has oval cross section and it fits well.