1STKIT PRO Screw-On Automatic Tire Deflators - Set of 4 (6-34 PSI)
The simple, solid way to air down: screw a 1STKIT PRO deflator onto each valve and it stops by itself at your set pressure. 6-34 PSI in 0.5 PSI steps, red anodized aluminum, set of 4 in a protective tin.
Description
The PRO is our no-fuss deflator. It threads straight onto the valve, so there is nothing to clip and nothing to come loose. Set the pressure, screw it on, and let it do the rest.
HOW IT WORKS
- Set your target PSI on the dial.
- Remove the valve caps and screw a deflator onto each valve.
- All four tires deflate together. Each deflator shuts off completely at the pressure you set.
- Unscrew, check with your gauge, and go.
WHY THE PRO
- Secure screw-on fit: stays put on the valve while the tires air down.
- Wide, fine adjustment: 6-34 PSI in 0.5 PSI steps - covers sand, snow, mud and rock.
- Accurate: use the auxiliary scale to match the deflators to your own gauge. In our test of 20 deflations set to 20 PSI, results ranged from 18.8 to 20.4 PSI, typically within about 1 PSI.
- Light and tough: anodized aluminum body, handles working pressures up to 180 PSI.
- Great value: the full set of 4 with a protective tin for less than most single-color premium kits.
Note: out of the box, the first reading can differ from your gauge by 0-3 PSI. Calibrate once with the auxiliary scale.
SPECIFICATIONS
- Pressure range: 6-34 PSI, 0.5 PSI steps
- Max working pressure: 180 PSI
- Connection: screw-on, fits standard Schrader valves
- Body: anodized aluminum, red
- In the box: 4 deflators + protective tin
- Warranty: 2 years
Add our compact tire repair kit and you're ready for whatever the trail throws at you.
DDP: Seller responsible for customs clearance & no extra import fee.
Order Protection
- ✓ Secure payments
- ✓ 2-Year Warranty / Support
- ✓ 30-Day Refund / Replacement
Built for consistency
Tested for repeatability
Across 20 consecutive deflations at a 20 PSI setting, every reading landed between 18.8 and 20.4 PSI, typically within about ±1 PSI of the set pressure. The chart shows the full test data.
Calibrating to your gauge
Straight out of the box, your first deflation may read 0–3 PSI away from the setting, because the final reading also depends on your gauge, your tire size and model, and your valve stem.
The built-in auxiliary scale corrects the difference. Say you set 18 PSI and your gauge shows 15 PSI: set the deflator to 21 PSI instead. Once calibrated, results are typically within ±1 PSI.
Shuts off completely
When the tire reaches your set pressure, the valve closes all the way with a soft “pop” you can hear up close, and the tire stops losing air. Some deflators never seal fully and keep leaking slowly. Some other deflators behave like the lower curve in the chart.
Anodized aluminum body. Protective tin box included. 2-year warranty.
Videos
The video below explains in detail how to set the tire pressure, how to fine-tune the pressure value, when maintenance is needed, how to perform maintenance, and the mistakes that may affect the final tire pressure.
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