Top 5 compared
The best tire inflators
Air back in a soft tire on the driveway in a few minutes, with no lineup at the gas station air machine.
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The top 5 at a glance
A tire inflator is a small air compressor for putting air back into a low tire, on the driveway or at the roadside. Most are compact and digital: they plug into the car’s 12V outlet or run on their own battery, and stop by themselves at the pressure you set. Heavier compressors clamp straight onto the car battery and fill big truck and trailer tires faster.
Set the pressure with the tires cold, before a drive; the right figure is on a sticker in the driver’s door frame or in the owner’s manual. Pressure drops as the air cools, so tires filled on a mild afternoon can read low after a cold night.
What matters
- Auto shut-off at the pressure you set, so it can’t over-fill.
- A built-in light, for a soft tire on a dark evening.
- Power that suits where it lives: a battery, the 12V outlet or clamps.
#1AstroAI AIRUN H2 Pro Cordless Tire Inflator (150 PSI)
$50–$75
Power comes from its own battery or the car’s 12V outlet, whichever is handier, and it stops at the pressure you set; AstroAI gives it up to 18 minutes a charge. None of the three higher scorers runs cordless as sold: the DEWALT is sold without its tool battery, and both VIAIRs clamp onto the car battery.
What owners say: Owners find it easy to set: key in the pressure and it fills to it, quickly enough for a big car tire, and they like how small it is.
A closer look: On its battery it runs for short stretches; plugged into the 12V outlet it keeps going for up to an hour, the way to fill a tire from flat. The nozzles and adapters ride in a compartment on the body, and the whole kit is small enough for the glove box.
- Up to an hour plugged-in
- Fits in the glove box
- Nozzles stored on board
Best for: Car tires, at home or roadside
- Power
- Rechargeable battery or 12V outlet
- Stops at the set pressure
- Yes
- Display
- Digital
- Max pressure
- 150 PSI (10.3 bar)
- Built-in light
- Yes
#2DEWALT 20V MAX Tire Inflator (DCC020IB, tool only)
$200–$300
Part of DEWALT’s 20V MAX range: it runs on one of its batteries, or from the car’s 12V outlet with the cord in the box, and stops at the pressure you set, up to 160 PSI. A second mode moves a lot of air at low pressure for air mattresses and pool toys. The battery and charger are sold separately.
What owners say: It runs well on owners’ own DEWALT 20V batteries, they say, is easy to use and fills to the programmed pressure accurately, and it carries easily.
A closer look: Screw the threaded chuck onto the valve so it can’t pop off, set the pressure on the digital gauge and let it run. The nozzles and the 12V cord live on board, so it can stay in the trunk and work from the car with no battery fitted; swap the hose to the deflate port to empty a mattress.
- 12V car cord included
- Fills air mattresses fast
- Deflates mattresses too
- Screw-on valve chuck
Best for: DEWALT 20V MAX tool owners
- Power
- DEWALT 20V MAX battery (sold separately) or 12V outlet
- Stops at the set pressure
- Yes
- Display
- Digital
- Max pressure
- 160 PSI (11 bar)
- Built-in light
- Yes
#3VIAIR 400P Portable Air Compressor (12V, 150 PSI)
Over $300
A big compressor for trucks, Jeeps and trailers: it clamps straight onto the battery, works up to 150 PSI, and VIAIR says it takes a 33-inch tire from flat to 30 PSI in four minutes. The 7.6 m (25 ft) coiled hose reaches every wheel and has a gauge and deflator built in, for airing down before the trail and back up after.
What owners say: Plenty of power for big tires and quick on an ordinary car tire, owners report; it feels well made, carries easily and isn’t loud. The price divides them.
Heads up: VIAIR doesn’t recommend its coiled air hose in sub-zero conditions, so it’s best kept for trail and trailer days in the warmer months.
A closer look: VIAIR rates it to run a third of the time at 100 PSI, so on a big rig give it a rest between tires. Stand it on its anti-vibration tray to keep grit out of the motor, and pack the hose in the bag’s second compartment, away from the battery clamps.
- Airs tires down for trails
- Tires up to 35 inches
- Sand tray and carry bag
Best for: Off-roading on big tires
- Power
- 12V, clamps to the battery
- Stops at the set pressure
- No
- Display
- Inline gauge (to 100 PSI)
- Max pressure
- 150 PSI (10.3 bar)
- Built-in light
- No
#4VIAIR 88P Portable Air Compressor (12V, 120 PSI)
$100–$150
A compact compressor for pickups, SUVs and RVs: it clamps straight onto the car battery, fills tires up to 33 inches at up to 120 PSI, and has a 4.9 m (16 ft) hose and a 3 m (10 ft) cord, enough to reach every wheel.
What owners say: Powerful and quick, owners say, with build quality they’re happy with and a size that’s easy to carry; how long it lasts draws mixed reports.
Heads up: There’s no auto-stop: watch the dial and switch it off when the tire reaches the pressure you want.
A closer look: Start the engine before clipping the clamps to the battery, as VIAIR advises, then twist the brass chuck onto the valve. It runs for 25 minutes at a time at 30 PSI before it needs to cool, plenty for four car tires, works down to −20°C (−4°F), VIAIR says, and packs into its carry bag.
- Works down to −20°C
- Twists onto the tire valve
- Tires up to 33 inches
- Runs 25 minutes before cooling
- Carry bag included
Best for: Drivers of pickups and RVs
- Power
- 12V, clamps to the battery
- Stops at the set pressure
- No
- Display
- Dial gauge
- Max pressure
- 120 PSI (8.3 bar)
- Built-in light
- Yes
#5AstroAI S1 12V Tire Inflator with Digital Gauge
$30–$50
A plug-in inflator that never needs charging: it runs from the car’s 12V outlet on a 3 m (9.9 ft) cord and stops at the pressure you set. AstroAI’s figure for a 185/55 R14 tire is 30 to 36 PSI in under a minute. It can stay in the car for good, ready for the next soft tire.
What owners say: Very easy to set up and quick, owners say, under two minutes to 41 PSI, and they rate its quality highly.
A closer look: The hose is short, 48 cm (19 in), so stand it on the ground by the wheel; the cord reaches the back tires from the front outlet on most cars. AstroAI asks for a rest after 15 minutes’ running, which only matters when filling a tire from flat.
- Never needs charging
- 3 m (9.9 ft) cord
- Light turns on automatically
- Spare fuse in the box
Best for: Topping up without charging anything
- Power
- 12V outlet
- Stops at the set pressure
- Yes
- Display
- Digital
- Max pressure
- 150 PSI (10.3 bar)
- Built-in light
- Yes
How they compare
Swipe sideways or rotate device to see all 5.
| Feature | #1AstroAI H2 Pro | #2DEWALT DCC020IB | #3VIAIR 400P | #4VIAIR 88P | #5AstroAI S1 |
|---|---|---|---|---|---|
| Best overall | Best for DEWALT owners | Best premium | Best for SUVs and RVs | Best budget | |
| Picked Rating | 9.0 | 9.4 | 9.3 | 9.1 | 8.8 |
| Price | $50–$75 | $200–$300 | Over $300 | $100–$150 | $30–$50 |
| Power | Rechargeable battery or 12V outlet | DEWALT 20V MAX battery (sold separately) or 12V outlet | 12V, clamps to the battery | 12V, clamps to the battery | 12V outlet |
| Stops at the set pressure | Yes | Yes | No | No | Yes |
| Display | Digital | Digital | Inline gauge (to 100 PSI) | Dial gauge | Digital |
| Max pressure | 150 PSI (10.3 bar) | 160 PSI (11 bar) | 150 PSI (10.3 bar) | 120 PSI (8.3 bar) | 150 PSI (10.3 bar) |
| Built-in light | Yes | Yes | No | Yes | Yes |
| Best for | Car tires, at home or roadside | DEWALT 20V MAX tool owners | Off-roading on big tires | Drivers of pickups and RVs | Topping up without charging anything |
| Buy now | Amazon | Amazon | Amazon | Amazon | Amazon |
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