How can I fix the hook of a weather proof pannier? I have a pair of Mainstream panniers (msx sl 55) but the rivet that holds the hook on the bag fell off. You can see it on images outside and inside




How can I fix it while maintaining it weather proof?
I just used a 5mm bolt with locking nut, and a ~15mm wide washer on the inside when this happened to my Ortleib. If you use stainless steel bolt, nut and washers it won't rust and the pressure against the pannier materials stops it leaking. I'd use the biggest washer you can find on the inside, but the biggest I could find was only 15mm. If you look at the other rivet you will probably find that the washer is smaller than that, and possibly that the other rivet is also about to fail.

My repair has lasted several years of regular use, and I still have the pannier today as a backup (I bought new ones when I wore holes in the fabric after more than 10 years of use)