Can You Safely Put A Chain In The Tail Pack?

I have carried chains that way on previous bikes but wouldn’t want to do it on a tail pack that was high or zipped at the side.
Have you considered a quality u lock such as the Abus granite extreme series and a disc lock as further backup.
Both of those would be lighter and less likely to shift about.

 

Could you attach some strapping inside the tail pack that would hold the chain down? Perhaps heavy duty velcro to make it easy to use? Securely sewing the ends to the four corners of the bottom of the pack with enough overlap to meet and hold?? May not be pretty but would work well.

I had elastic straps in my larger Givi box which were very helpful in stopping things moving about so much but a heavy chain may need something stronger.