Originally Posted by
mharter
Granular things in bags are very hard to secure to a rack. The contents move away from ties as they are shaken by bumps. Either the straps get loose enough to fall away, or the bag oozes out from under them.
I lost a 30 pound bag of dog food right by the dog park on my way home. It ripped open and kibble poured out. Most of it was recovered, and the rest was cleaned up quickly by the locals.
I found the best way to carry a large bag like that on a rack is to fold the bag in a way that makes it's contents very tightly packed, then wrap a cargo net over it as tightly as possible. Smaller bags will fit into a pannier.
Dog food is just a pain to carry on a rack.
I know what you mean, but that wasn't the problem in this case. Unlike my dog food, the cat food is packed in a heavy duty plastic bag(Have to get a knife to open the bag) and has been sealed with so little air that it's basically a slab.
I think I just need some ratcheting staps+the cargo net. I'm not sure I could get a bag of dog food on my rack, as mine only comes in 40 lb bags and it's larger chunks. Maybe with the platform extender like someone mentioned.