Originally Posted by
cyclezen
can't give up a bottle cage/mount for the WOlftoothStrap/ plate - so also need the 'extension' bar ? - too much for me...
The B-Rad system essentially turns one mounting location into two.
I use the "3 slot mounting base" and am able to mount a water bottle cage to the top half, and the strap/accessory mount to the lower half. It all attaches to the bike using the two bolts on the seat tube. The roll-top bag attaches to the plate with a velcro strap, so nothing is actually touching the frame.