The ARB CKMTP12 Twin Portable is the better tire inflator overall, rated 3.5 to 3.1. The ARB CKMTP12 Twin Portable leads on airflow and warranty. The VIAIR 400P EF wins on value. The VIAIR 400P EF costs $702.96 less ($252.04 vs $955).
For serious overlanders with 35 in and larger tires, or groups airing up several vehicles, who want the fastest portable air and can justify the price. Most drivers are better served by a single-motor unit.
Amazon $955For 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 $252.04Prices 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.
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 | ARB CKMTP12 Twin Portable | VIAIR 400P EF |
|---|---|---|
| Overall rating | 3.5/5 | 3.1/5 |
| Value 35% | 0 $955 | 59 $252.04 |
| Airflow 30% | 100 174.4 L/min (maker) | 41 73 L/min (maker) |
| Features 20% | 60 100% duty cycle, 150 PSI max; no auto shutoff | 60 runs 60 min at a time, 150 PSI max; no auto shutoff |
| Warranty 15% | 100 3-year warranty | 0 1-year warranty |
| ARB CKMTP12 Twin Portable | VIAIR 400P EF | |
|---|---|---|
| Inflating | ||
| Max pressure | 150 PSI | 150 PSI |
| Airflow (maker) | 174.4 L/min | 73 L/min |
| Auto shutoff | No | No |
| Duty cycle | 100% (continuous) | 60 min on |
| Noise | - | 73 dB |
| Power | ||
| Power | Battery clamps | Battery clamps |
| Power bank | No | No |
| Power cord | - | 6 ft |
| Build | ||
| Air hose | 240 in | 300 in |
| Light | No | No |
| Dimensions | 18.8 x 14.0 x 7.3 in (case) | 10.9 x 5.8 x 7.4 in |
| Weight | 33 lb | 10.3 lb |
| Warranty | 3 years | 1 year |
