Originally Posted by
cyccommute
Probably not a good idea to use the bags at all with your rack. It's not a weight issue, it's a safety issue. The single leg on your rack won't keep the bags from swinging into the spokes. That could be an expensive lesson. Get a Delta MegaRack Universal instead.
The front leg on the Univeral will keep the bag from rotating to the wheel.
The bags have some kind of stiffener board in the back of them, wouldn't that be enough to keep them out of the spokes if the front edge of the bag comes in contact with the seat stay? I used to ride a BMW motorcycle that came with bags that were known to fly off the bike if they weren't secured with a bungy cord (how's that for precision German engineering?) - this is a whole new worry for me.