VIAIR 300P
#5 in Heavy dutyFull review
For truck, Jeep and SUV owners who air down on weekends and want a proven compressor at a sensible price. Bigger tires or long sessions call for a 400P or 450P.
Amazon $158.06 VIAIR $149.95$149.95
The VIAIR 300P is the better tire inflator overall, rated 3.3 to 2.8. The VIAIR 300P leads on value. The VIAIR 300P costs $157.65 less ($149.95 vs $307.60).
VIAIR 450P-A EF
#9 in Heavy dutyFull review
For RV, trailer and big-truck owners who run high pressures or fill many tires in a row and want a compressor that never needs a rest. For fastest fills at trail pressures, the 400P EF is quicker.
Amazon $307.60$307.60
Prices were last checked October 22, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the VIAIR 300P for value ($149.95 vs $307.60).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every heavy duty tire inflator; a clear win is highlighted. How we rank explains each one.
| Factor weight | VIAIR 300P | VIAIR 450P-A EF |
|---|---|---|
| Overall rating | 3.3/5 | 2.8/5 |
| Value 35% | 83 $149.95 | 46 $307.60 |
| Airflow 30% | 31 65.1 L/min (maker) | 28 62 L/min (maker) |
| Features 20% | 60 runs 30 min at a time, 150 PSI max; no auto shutoff | 60 100% duty cycle, 150 PSI max; no auto shutoff |
| Warranty 15% | 0 1-year warranty | 0 1-year warranty |
Specifications
| VIAIR 300P | VIAIR 450P-A EF | |
|---|---|---|
| Inflating | ||
| Max pressure | 150 PSI | 150 PSI |
| Airflow (maker) | 65.1 L/min | 62 L/min |
| Auto shutoff | No | No |
| Duty cycle | 30 min on | 100% (continuous) |
| Noise | 78 dB | - |
| Power | ||
| Power | Battery clamps | Battery clamps |
| Power bank | No | No |
| Power cord | 8 ft | 6 ft |
| Build | ||
| Air hose | 300 in | 360 in |
| Light | No | No |
| Dimensions | 9.0 x 4.9 x 7.5 in | 12.4 x 5.8 x 7.4 in |
| Weight | 8.7 lb | 13 lb |
| Warranty | 1 year | 1 year |