Overview
This is one of those small upgrades that makes a repeated job feel cleaner, faster, and a lot less annoying.
If you air down with any regularity, the part that gets old is not the idea of airing down. It is crouching around every tire, guessing, checking, and doing the same little routine over and over. Preset deflators make that feel more like a system and less like a chore.
Stauns have been around long enough to earn a real reputation because they do the job the way people want it done: thread them on, let them work, and spend that time doing something else instead of babysitting the valve stem.
They are not magic, but they are the kind of tiny equipment upgrade that pays off every time you touch dirt and want to drop pressure without burning daylight.
Airing down is a lot more tolerable when it stops feeling like four separate little jobs.