VIAIR 400P EF
#7 in Heavy dutyFull review
For off-roaders on 33 to 35 in tires who air down regularly and want quicker, longer runs than a 300P without paying for a twin. It is the sweet spot of VIAIR’s portable line.
Amazon $252.04$252.04
The VIAIR 400P EF is the better tire inflator overall, rated 3.1 to 2.8. The VIAIR 400P EF leads on value and features. The ARB CKMP12 Portable (V2) wins on warranty. The VIAIR 400P EF costs $234.96 less ($252.04 vs $487).
ARB CKMP12 Portable (V2)
#8 in Heavy dutyFull review
For overlanders who value ARB’s durability, case and three-year warranty over raw speed. Buyers chasing airflow per dollar will do better with a VIAIR 400P EF.
Amazon $487$487
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 400P EF for value ($252.04 vs $487) and features (runs 60 min at a time, 150 PSI max; no auto shutoff vs runs 30 min at a time, 100 PSI max; no auto shutoff).
- Choose the ARB CKMP12 Portable (V2) for warranty (3-year warranty vs 1-year warranty).
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 400P EF | ARB CKMP12 Portable (V2) |
|---|---|---|
| Overall rating | 3.1/5 | 2.8/5 |
| Value 35% | 59 $252.04 | 3 $487 |
| Airflow 30% | 41 73 L/min (maker) | 44 75.1 L/min (maker) |
| Features 20% | 60 runs 60 min at a time, 150 PSI max; no auto shutoff | 43 runs 30 min at a time, 100 PSI max; no auto shutoff |
| Warranty 15% | 0 1-year warranty | 100 3-year warranty |
Specifications
| VIAIR 400P EF | ARB CKMP12 Portable (V2) | |
|---|---|---|
| Inflating | ||
| Max pressure | 150 PSI | 100 PSI |
| Airflow (maker) | 73 L/min | 75.1 L/min |
| Auto shutoff | No | No |
| Duty cycle | 60 min on | 30 min on |
| Noise | 73 dB | - |
| Power | ||
| Power | Battery clamps | Battery clamps |
| Power bank | No | No |
| Power cord | 6 ft | - |
| Build | ||
| Air hose | 300 in | 276 in |
| Light | No | No |
| Dimensions | 10.9 x 5.8 x 7.4 in | 14.0 x 12.1 x 7.2 in (case) |
| Weight | 10.3 lb | 15.4 lb |
| Warranty | 1 year | 3 years |