VIAIR 300P Portable Compressor (30033) Review
A 150 PSI, 2.30 CFM battery-clamp compressor for tires up to 33 inches, with a 25 ft hose and an IP54 rating, at 8.7 lb.
By Watt Versus Editorial· Updated
This page was drafted with AI assistance from manufacturers' specs and manuals, and is checked by our editor.
Our verdict
A lighter VIAIR for trucks, Jeeps and SUVs on tires up to 33 inches, with the same airflow as the 400P. If you run 35-inch tires, buy the 400P.
Pros and cons
Pros
- Same 2.30 CFM airflow and 33% duty cycle at 100 PSI as the VIAIR 400P, at 8.7 lb against 10.4 lb
- 25 ft hose reaches all four tires from one spot
- IP54 rating against dust and splashes, per VIAIR
- Thermal overload protector
Cons
- Rated for tires up to 33 inches; the 400P is rated for 35 inches
- No auto shut-off: you watch the gauge and stop it yourself
- Clamps to the battery, so you open the hood every time
- VIAIR does not recommend the included hose in freezing weather
Specifications
| Max pressure | 150 PSI |
|---|---|
| Power source | 12 V vehicle battery, via dual battery clamps |
| Battery | Not needed (runs from the vehicle battery) |
| Airflow | 2.30 CFM at 0 PSI |
| Duty cycle | 33% at 100 PSI |
| Max tire size | Up to 33 in |
| Display | Inline 100 PSI gauge on the hose |
| Hose length | 25 ft coil hose with 5-in-1 inflator/deflator |
| Power cord | 8 ft; 30 A max draw |
| Included accessories | Carry bag, 3-piece inflation tips kit, Presta valve adaptor, aluminum sand tray, 40 A inline fuse holder |
| Weight | 8.7 lb |
| Warranty | 1 year |
Who it suits
Owners of trucks, Jeeps and SUVs on tires up to 33 inches who air down for trails or sand and need to air back up before driving home. VIAIR lists 2.30 CFM at 0 PSI, a 33% duty cycle at 100 PSI and a 150 PSI maximum, the same airflow and duty cycle it lists for the 400P, in an 8.7 lb kit with a 25 ft hose.
Who should skip it
Owners of 35-inch tires: VIAIR rates the 300P for 33 inches and the 400P for 35; see VIAIR 300P vs 400P. Drivers who only top off a car's tires now and then will find a cordless inflator such as the Milwaukee M18 2848-20 quicker to use.
What we could not confirm
VIAIR's product page does not mention an auto shut-off, so we treat it as having none. VIAIR's warranty page gives one year for its products without naming models. VIAIR also notes the 300P does not work with its Winterization Kit (90145) and that the hose is not recommended in sub-zero conditions.
Frequently asked questions
- What size tires can the VIAIR 300P fill?
- VIAIR rates the 300P for tires up to 33 inches and the 400P for tires up to 35 inches.
- What is the difference between the VIAIR 300P and 400P?
- VIAIR lists the same 2.30 CFM airflow and 33% duty cycle at 100 PSI for both. The 300P weighs 8.7 lb and is rated for 33-inch tires; the 400P weighs 10.4 lb and is rated for 35-inch tires.
- How does the VIAIR 300P get power?
- It clamps directly to a 12 V vehicle battery and draws up to 30 A, according to VIAIR.
Sources
The specifications and claims on this page come from these manufacturer documents. Figures are the manufacturers' own unless the text says otherwise.
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