Milwaukee M18 and M12 Inflators and the Compatible Options

Best for
M18 owners wanting a small third-party pump

The LIVOWALNY Tire Inflator Air Compressor Compatible with Milwaukee 18V batteries is a third-party pump, not a Milwaukee product. It is sold as a tool only and lists compatibility with M18 packs including 48-11-1820, 48-11-1840, 48-11-1850 and 48-11-1860. Inside is a metal cylinder and metal gear with a 25mm cylinder and brushless motor, rated at 30 liters per minute and a 160 psi maximum.

The listing claims it can run continuously for 20 minutes, enough for four tires, and fill a 195/65/R15 tire in under three minutes. A digital gauge shows target and current pressure in psi, bar, kPa and kg, with auto shut-off and a stated accuracy of plus or minus 0.5 psi. It comes with four nozzles, preset modes and a two-mode flashlight with SOS. It weighs 0.93 kg. This suits M18 owners who want a light, high-pressure pump and accept that support comes from the third-party maker.

• 160 psi max, 30 L/min
• Auto shut-off with digital gauge
• 4 nozzles and preset modes
• Flashlight with SOS

Best for
Buyers who verify seller details first

The 2848-20 for Milwaukee M18 18V Cordless inflator listing is the one to approach with care. It uses the same 2848-20 model number as Milwaukee’s M18 Inflator and describes itself as a bare tool, but its brand field names AIROXY, not Milwaukee, and the listing offers no features, performance figures or accessory list beyond noting it is cordless and meant for tire inflation.

That could be a reseller listing for the genuine tool, or it could be something else; the listing does not specify, and we cannot confirm which. If you want the Milwaukee M18 inflator 2848-20 with Milwaukee’s documented accessories and specs, the Milwaukee-branded listing further down gives you far more to go on. Consider this one only after checking the seller, the photos and the box details carefully.

Best for
Glovebox storage on an M18 battery

The Tire Inflator Portable Air Compressor Compatible with Milwaukee 18V batteries is a second LIVOWALNY model, smaller than the first. It uses a 21mm metal cylinder, rated at 28 liters per minute and 150 psi, and the listing claims a 195/65/R15 tire in about four minutes. It is a tool-only unit that lists the same M18 battery compatibility. One line in the listing also mentions a different tool battery brand, so double-check the version you order fits Milwaukee packs.

The HD LCD shows real-time pressure with a stated error of 1% or less, offers five presets plus custom values from 3 to 150 psi, and shuts off at the target. The light has steady white, red warning and flashing SOS modes. At 0.71 kg and 7 x 3 x 8 inches, with an integrated hose and five nozzles, it is sized for a door pocket or glovebox. It gives up some speed and pressure to the 160 psi model, in exchange for a smaller body.

• 150 psi max, 28 L/min
• 5 presets plus custom pressure
• Three-mode emergency light
• Integrated hose, 5 nozzles

Best for
Light truck tires and shop use

The Milwaukee M18 Inflator 2848-20 is Milwaukee’s own 18V tire inflator, and it is the pick for anyone who regularly deals with bigger tires. Milwaukee calls it the fastest 18V cordless tire inflator and claims it can top off 33-inch light truck tires in under a minute. It is optimized for passenger, light truck and other medium-duty tires.

It runs on the M18 connector, reaches 150 psi and has a 36-inch hose. Accessories include an all-brass Schrader chuck, an inflation needle, an inflator nozzle and a Presta chuck, so it covers car tires, bikes and sports balls. The trade-off is size: 7.7 pounds and 14.7 x 7 x 8.3 inches, much bigger than the third-party pumps. The listing does not state that a battery is included. It belongs in a truck bed, garage or job trailer rather than a glovebox, and it pairs naturally with other gear such as a Milwaukee 18 volt air compressor for shop air.

• Genuine Milwaukee M18
• 150 psi, 36-inch hose
• Brass Schrader and Presta chucks

Best for
Car owners on the M12 platform

The Milwaukee Electric Tools 2475-20 M12 Compact Inflator is the smaller genuine option. Milwaukee claims it tops off a car tire from 28 to 35 psi in under a minute and fills a light truck tire from 30 to 45 psi in under four minutes, with a high efficiency pump for true 120 psi capability. REDLINK intelligence and TrueFill auto shut-off improve accuracy and protect against over-temperature and over-fill.

An illuminated digital gauge shows target and current pressure, a reinforced cage adds weather and impact resistance, the hose is 26 inches and the listed gauge accuracy is plus or minus 3% with a 50% duty cycle. Some spec lines do not add up: the table lists 220 volts and 63 cfm, while the feature text gives 0.63 cfm at 35 psi, and a weight appears as 3.83 inches. Take the feature text as the guide. For car owners already on M12, this is the natural Milwaukee tire inflator; for light truck tires often, the M18 is faster.

• TrueFill auto shut-off
• 120 psi max
• Reinforced protective cage
• 26-inch hose

Best for
Drivers without a tool battery yet

The Upgraded Tire Inflator Portable Air Compressor is another third-party unit, sold under the SYPOUSY brand. Its big difference is that it ships with its own rechargeable battery, so it works out of the box, and the listing says it can also run on Milwaukee 18V packs among other platforms. That makes it the easiest start for someone who wants a cordless tire inflator before committing to a tool battery system.

It is rated at 30 liters per minute. Maximum pressure is listed as 160 psi in the feature text and 170 psi in the specifications, so expect the lower number. It has a digital display in four units with plus or minus 2 psi accuracy, auto shut-off, an LED light and a 50 cm hose. The listing recommends a 3-minute cool-down after 10 to 15 minutes of use and claims a full charge handles about five 195/60R14 tires from flat to 36 psi. A 12-month coverage period is listed.

• Own battery included
• Also runs on Milwaukee 18V packs
• Auto shut-off with 4-unit display