Milwaukee M18 Inflator 2848-20
#4 in CordlessFull review
For M18 owners with trucks or several vehicles who want the fastest cordless fill and don’t mind the price.
Amazon $166.85$166.85
The Milwaukee M18 Inflator 2848-20 rates 3.6 among cordless tire inflators; the VIAIR 300P rates 3.3 among heavy duty ones. The VIAIR 300P costs $16.90 less ($149.95 vs $166.85).
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
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.
Scores side by side
These two sit in different type classes (cordless and heavy duty), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | Milwaukee M18 Inflator 2848-20 | VIAIR 300P |
|---|---|---|
| Overall rating | 3.6/5 | 3.3/5 |
| Value 35% | 9 $166.85 without battery | 83 $149.95 |
| Airflow 30% | 83 39.9 L/min (maker) | 31 65.1 L/min (maker) |
| Features 20% | 88 auto shutoff, runs 20 min at a time, 150 PSI max | 60 runs 30 min at a time, 150 PSI max; no auto shutoff |
| Warranty 15% | 100 5-year warranty | 0 1-year warranty |
Specifications
| Milwaukee M18 Inflator 2848-20 | VIAIR 300P | |
|---|---|---|
| Inflating | ||
| Max pressure | 150 PSI | 150 PSI |
| Airflow (maker) | 39.9 L/min | 65.1 L/min |
| Auto shutoff | Yes | No |
| Duty cycle | 20 min on | 30 min on |
| Noise | - | 78 dB |
| Power | ||
| Power | Milwaukee M18 battery (sold separately) | Battery clamps |
| Power bank | - | No |
| Power cord | - | 8 ft |
| Build | ||
| Air hose | 36 in | 300 in |
| Light | - | No |
| Dimensions | 13.8 x 6.4 x 7.8 in | 9.0 x 4.9 x 7.5 in |
| Weight | 7 lb | 8.7 lb |
| Warranty | 5 years | 1 year |