Replacement buckles for Ortlieb bags
If you travel with Ortlieb bags long enough, the buckles will eventually break. They’re rather dainty because they’re designed to flex easily, so you don’t waste any time opening the bags even with cold fingers.

I had a hard time figuring out what parts to get when the buckles for my add-on pockets broke. Turns out they’re the same as the ones on my Sport Packer bags. When you replace them, though, you don’t need to worry about putting on the adjustable kind, because the straps are not meant to be adjustable. So you can use these:

https://us.ortlieb.com/products/repair-kit-for-stealth-side-release-buckles $7.00. These have an opening mechanism for easy repair, so you don’t have to cut and/or re-sew the straps. They fit with Office-Bag, Back-Roller, and Sport-Roller models with Stealth buckle, but remember, if you use these you won’t be able to pull the straps partway through to adjust the length.

You’ll need some way to cut off the old broken buckle, but the new one can just snap closed.
An inventory of the other buckles on the Ortlieb site:
Note that for buckles that are built into straps, you can get it replaced by paying a visit to a local upholsterer, shoemaker, or luggage repair shop. They’re likely to have the beefy sewing machines that can handle the bag material.

For Office-Bag since 1999 https://us.ortlieb.com/products/side-release-buckle-stealth-25mm-with-strap $4.00.

For Seat-Pack https://us.ortlieb.com/products/buckle-seat-pack $4.00.

For waist strap. Side-release buckle, 50 mm https://us.ortlieb.com/products/side-release-buckle-50-mm $7.00.

For all Bike-Tourer models without magnetic closure. 40 mm https://us.ortlieb.com/products/side-release-buckle-40-mm $7.00.

Stealth- side-release buckle, 25mm https://us.ortlieb.com/products/stealth-side-release-buckle-x $4.00.

For all Commuter-Bag, Commuter-Bag Two and Rack-Pack Urban models. https://us.ortlieb.com/products/x-lite-side-release-buckle $3.00.

Stealth buckle for all models, including the Back-Roller and Sport-Roller. Like the ones at the top of the page, except both sides of the buckle are included. https://us.ortlieb.com/products/repair-kit-stealth-side-release-buckle $8.00.
