The CampBoss 4x4 Boss Air Tyre Deflators are four automatic deflators with a laser-etched pressure scale, which makes them the easiest set we’ve tested to dial in. They adjust from 5 to 30 PSI, weighed 114 g in their pouch, and stop at the set pressure every time. They’re our top-rated deflators. I paid $90 for them.
What’s in the box
Four deflators with a nickel-plated, anti-corrosive body and stainless steel internals, in a neoprene pouch with a slot for each deflator and a carabiner to clip it onto a recovery bag.
What we like
- Laser-etched scale, easy to set
- Stops on the set pressure
- 5 to 30 PSI
- Lightest set: 114 g
- Pouch with a slot for each
What we don’t
- First setting still needs care
- Keep the etched scale clean
- No higher than 30 PSI
Quick Specs
| Spec | Details |
|---|---|
| Brand | CampBoss 4x4 |
| Material | Nickel-plated bodyStainless steel internals |
| Weight | 114 gwith the pouch |
| Type | Automatic |
| Pressure range | 5–30 PSI |
| Pack | Set of 4 |
| Included | 4 deflatorsNeoprene pouch with carabiner |
Setting them
This is the best part. Unscrew the top cap, turn the body until its bottom edge lines up with the pressure you want on the laser-etched stem, and screw the cap back on to lock it. No separate gauge, no trial and error: set to 18 PSI, it reads 18 on the stem. The knurled body grips well, even with cold or muddy hands.
On the tyres
Screw one onto each valve and the air rushes out straight away; when the tyre reaches the set pressure, it stops. Set to 15 PSI for deep sand, ours stopped on that reading every time, and the lock holds the setting from one trip to the next.
Build and carry
The nickel-plated body and stainless internals are made to stand up to mud, sand and water, and the deflators come apart completely, so you can clean out grit. Keep the etched scale clean so you can read it. At 114 g in the pouch, the set is lighter than the others we’ve tested.
Deflators compared
We also use the KickAss Tyre Deflator Set and the Staun Tyre Deflators. The KickAss is also easy to set and cost less, but it only goes down to 10 PSI. The Staun goes down to 6 PSI, but setting it is more fiddly. Our tyre deflators guide compares all the deflators and gauges we’ve tested.
This one CampBoss Boss Air |  KickAss Deflators |  Staun Deflators | |
|---|---|---|---|
| Easy to set | Yes | Yes | No |
| Type | Automatic × 4 | Automatic × 4 | Automatic × 4 |
| Range | 5–30 PSI | 10–30 PSI | 6–30 PSI |
| Weight | 114 g | 133 g | 147 g |
| Price paid | $90 | $50 | $80 |
| Our score | 9.5 | 9.3 | 9.3 |
Conclusion: CampBoss 4x4 Boss Air Tyre DeflatorsConclusion
The CampBoss Boss Air deflators are the best set we’ve tested: the laser-etched scale makes them quick to set, they stop at the set pressure every time, and the 5 to 30 PSI range covers everything from deep sand to touring. They’re light at 114 g and the pouch keeps them tidy. The first setting still needs care, the scale has to be kept clean and they don’t go above 30 PSI. I paid $90, and if you air down often, this is the set to get.
The best tyre deflators we’ve tested, and the easiest to dial in.
Line the body up with the laser-etched scale, screw the cap on and they stop at the set pressure every time, from 5 to 30 PSI. The first setting still needs care, the scale has to be kept clean and they don’t go above 30 PSI.
- 4WD tourers
- Beach & picnics
- Weekend trips
Yes. I paid $90, and if you air down often, the easy setting and consistent stops are worth it.
