M12BI-0 Compact Inflator Precision Inflation

When you need quick and accurate inflation of tyres, sports balls or other items, the Milwaukee M12BI-0 compact inflator delivers professional-grade performance in a compact package. Built for mechanics, tradespeople, and anyone who values speed and convenience, this 12 V cordless inflator offers impressive features packed into a small footprint.
Toolmart

Why this inflator stands out

High-performance capability – The inflator is rated to deliver up to 120 PSI, thanks to a high-efficiency motor and pump.
Toolmart
That means it can top-off a car tyre (e.g., 28-35 PSI) in under one minute, and a light truck tyre (30-45 PSI) in under four minutes.
Toolmart

Smart auto shut-off via TrueFill™ technology – It features the TrueFill™ auto shut-off system, which automatically senses when the target pressure is reached and stops inflation. That means no overfilling and safer, more accurate inflation—particularly useful when inflation particulars matter.
Toolmart

Digital gauge & user-friendly controls – The unit comes with a large back-lit LCD display, showing both target pressure and current pressure readings for better control.
Toolmart
Accuracy is within ±3%.
Toolmart

Compact, portable and job-site tough – At only 1.88 kg and a length of 165 mm (without mandrel collector) it remains highly portable.
Toolmart
It also features anti-vibration feet (so the tool stays steady when inflating), a reinforced cage for protection, and a 66 cm hose with an all-brass Schrader chuck—which enhances durability for workshop or garage use.
Toolmart

Versatile accessory set included – The unit includes the inflator tool itself (tool-only version) plus a ball inflation needle, Presta chuck and regular Schrader chuck attachment.
Toolmart

Where this inflator delivers major value

For automotive workshops or mobile mechanics who need a fast, accurate inflator that integrates with existing battery-systems (if you already run Milwaukee’s M12 platform).

For car‐enthusiasts or DIYers who want reliable tyre inflation, especially if frequently checking and adjusting pressures (e.g., for performance driving, off-road, etc.).

For multi‐use settings (sports equipment, bikes, inflatable gear) where a compact inflator that covers a variety of chuck types is highly convenient.

For users who value precision and safety, since the auto shut-off and digital gauge reduce the risk of mis-inflation.

Considerations before you buy

Tool only: This model is the “skin” only version, so the battery and charger are not included. You’ll need a compatible M12 battery if you don’t already own one.
Toolmart

While 120 PSI is sufficient for most automotive and general uses, if you regularly inflate track tyres, high‐pressure industrial tyres, or large commercial trucks, you may need a higher-capacity inflator.

Runtime will depend heavily on battery size/capacity. Since it’s compact and portable, for heavy usage you’ll want to pair it with a larger-capacity M12 battery for best results.

Final verdict

If you’re looking for a high-precision, compact inflator that offers strong performance, portability and built-in intelligence—and you already use (or plan to use) the M12 battery platform—then the Milwaukee M12BI-0 is a smart investment. It brings workshop-quality inflation capability into a more convenient, mobile form factor, making it well suited for both trade and enthusiast use.