VIAIR 300P Portable Compressor
CarCareTruth Score
Recommended.
Priced as of June 1, 2026
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Prices may varyThe Podium · Top 3 in Tire Inflator
See the full ranking →This product ranks #4 of 15 in Tire Inflator.Three above it ↓
CarCareTruth's Analysis
Last reviewed June 1, 2026
TL;DR Multiple community-timed fills on 33-inch off-road tires consistently came in under 3 minutes per tire, suggesting standard passenger-car fills well within that mark. No independent reference-gauge cross-check was found; gauge accuracy is unverified — carry a backup gauge.
What it is and how it performs
The VIAIR 300P is a 12V direct-battery compressor (alligator clamps) rated to 150 PSI. Two verified owners report reliable use after 10 and 12 years of regular trail service. It handles high-pressure work without thermal shutdown: community data shows four RV tires at 110 PSI in about 10 minutes. The inline gauge reads only when the motor is off — keep a stick gauge for precise checks.
Who should buy this — and who should skip it
Best for truck, SUV, and off-road owners who need confirmed high-PSI capability and long-term durability. The alligator clamps require hood access — no cigarette-lighter option. For quick passenger-car inflation with auto-shutoff, look at cordless alternatives.
Safety and environmental impact
No UL or ETL certification was confirmed in database searches; no active CPSC recall is on file. As a corded 12V unit it generates no battery-disposal burden; dispose at any municipal e-waste facility at end of life.
From the manufacturer
Marketing copy from VIAIR, via Amazon. Not editorial.
- •Tire Inflator Kit: Stay prepared at all times with the VIAIR 300P Compressor. Whether you are airing up after a quick off-road adventure or in an urgent flat tire situation, our air compressor offers a versatile and highly dependable solution.
- •Easy-to-Use: Clamp the power leads to your car or truck battery, connect the tire chuck to the valve stem, and turn the unit on. The pressure can be checked using the 5-in-1 Inflator/Deflator inline tire pressure gauge once the compressor is turned off.
- •Truck Accessories: Perfect for inflating tires up to 33" in overall tire diameter, this portable air compressor kit is ideal for trucks, jeeps, and SUVs. Our tire air pump kit is one of the must-have car accessories to ensure peace of mind on the road.
- •Specifications: The tire inflator kit operates off a 12-volt power source, delivering up to a maximum working pressure of 150 PSI and a 33% duty cycle; the free flow capacity is 2.30 CFM. The engine needs to be running during use for seamless operation.
- •Easy Portability: The air compressor comes with a deluxe dual-compartment carry bag, allowing you to carry and store the kit easily. With our tire air pump, say goodbye to long waits for roadside assistance or searching for the nearest gas station.
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Manufacturer videos
Manufacturer images
Manufacturer specifications
- Brand
- VIAIR
- Voltage
- 12 Volts
- Recommended Uses For Product
- Tire Inflation
- Power Source
- Battery Powered
- Noise Level
- 73 Decibels
- Noise
- 73 Decibels
- Additional Features
- Compact design with fast tire fills
- Maximum Power
- 414 Watts
- Capacity
- 2.3 Cubic Feet
- Maximum Current
- 30 Amps
- Air Flow Capacity
- 2.3 Cubic Feet Per Minute
- Hose Length
- 25 Feet
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