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Air Compressors

Best portable air compressors for a truck

A truck compressor has one job: get four tires back up to pressure without stopping to cool down. That makes published duty cycle the spec that decides it, not the CFM on the box.

By Ryder M.Last updated Published
A truck wheel being worked on at the roadside

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Read this first

The verdict, before the specs

For a truck on tires larger than 33 inches, buy the VIAIR 400P-Automatic: 150 PSI maximum, a published 33 percent duty cycle at 100 PSI, 30 feet of air hose, an automatic shutoff, and VIAIR's own rating up to 37-inch tires. It is for the owner airing down and back up on a regular basis. The budget pick is the VIAIR 88P: 120 PSI, a published 25 minutes at 30 PSI and 4.75 pounds - the right answer for a half-ton truck on factory-size tires, and the one that actually stays in the vehicle because it is small enough to forget about.

In between, the VIAIR 300P publishes the same 33 percent at 100 PSI as the 400P with 25 feet of hose instead of 30, and VIAIR rates it to 33-inch tires. The Smittybilt 2780 publishes the highest maximum output figure of the four and a 24-foot coil hose for less than the 300P, and publishes no duty cycle anywhere - which is the only reason it is not ranked higher.

Prices come live from our price layer in each buy button, with the date each was checked.

The spec that decides this category

A truck tire from 15 PSI to 60 PSI is a long continuous run. Published duty cycle at a stated pressure tells you whether the pump finishes the fourth tire. CFM at 0 PSI, which is what the box prints, does not.

The numbers behind it

Why truck tires are a harder job than car tires

Two things make a truck different. The pressures are higher - light truck and trailer tires commonly run 65 to 80 PSI against 32 to 36 PSI on a car - and the volumes are larger. A tankless pump's output falls as the pressure it is working against rises, so the same machine that fills a sedan's tire in two minutes takes far longer on an LT tire and runs much hotter doing it.

That is why a duty cycle quoted without a pressure is useless. VIAIR publishes 25 minutes at 30 PSI for the 88P and 33 percent at 100 PSI for the 300P and 400P-Automatic. Those are different kinds of statement: the first is a run time at a car-tire pressure, the second is a proportion at a pressure above anything you will set on a street tire. The second is the one that tells you about a truck.

Our CFM chart puts tire inflation at a working pressure of 30 to 60 PSI at the tire, which sounds trivially easy and is, for one tire. The job becomes demanding when it is four large tires in sequence on a hot day on a gravel shoulder, and that is precisely the moment a pump with no published endurance figure stops and you wait.

The four, on their makers' published figures
Max pressurePublished duty cycleRated tire sizeHose + cordWeight
VIAIR 400P-Automatic150 PSI33% at 100 PSIUp to 37 in30 ft + 8 ft10.70 lb
VIAIR 300P150 PSI33% at 100 PSIUp to 33 in25 ft + 8 ft8.70 lb
Smittybilt 2780150 PSINot publishedNot published24 ft + 10 ft13 lb
VIAIR 88P120 PSI25 min at 30 PSIUp to 33 in16 ft + 10 ft4.75 lb

Manufacturer-published figures only, attributed in the sources block. Flow figures are deliberately left out of this table: VIAIR publishes CFM at 0 PSI and Smittybilt publishes a maximum output, which are not comparable with each other or with a CFM-at-90-PSI figure.

Ranked

The picks

Quick picks

#ProductBest forScorePrice
1
VIAIR 400P-Automatic product photo
VIAIR 400P-AutomaticCFM not published / no tank / 150 PSI / 78 dBASame pump figures as the 300P with a 30 ft hose, an automatic shutoff and a 37-inch tire rating. Buy it for the reach and the walk-away, not for more air.
37-inch tires, or airing up without standing over the gauge1.9/10★☆☆☆☆
$260.74View on Amazon

#ad Disclosure - price as of November 14, 2026

2
VIAIR 300P product photo
VIAIR 300PCFM not published / no tank / 150 PSI / 78 dBAThe cheapest 12V unit here that publishes a duty cycle tied to a pressure: 33% at 100 PSI. That one figure is what you are paying the step up for.
A 33-inch tire set that gets aired down and back up regularly1.9/10★☆☆☆☆
$158.89$224.9529% offView on Amazon

#ad Disclosure - price as of November 14, 2026

3
Smittybilt 2780 product photo
Smittybilt 2780CFM not published / no tank / 150 PSI150 PSI and 2.5 CFM published from a 1/3 HP direct-drive motor, with a 24 ft coil hose in the box. Smittybilt publishes no duty cycle at all, which is the trade.
Re-airing a set of off-road tires when you would rather not pay VIAIR money1.9/10★☆☆☆☆
Check price on Amazon

#ad Disclosure - we do not publish prices we cannot verify

4
VIAIR 88P product photo
VIAIR 88PCFM not published / no tank / 120 PSI / 81 dBAA 12V tire inflator, not a compressor. 120 PSI max with a 25-minute duty at 30 PSI. Buy it for the car, not the garage.
Topping up and re-airing tires away from a wall outlet1.7/10★☆☆☆☆
$89.89$103.9514% offView on Amazon

#ad Disclosure - price as of November 14, 2026

Scores are computed from manufacturer-published specs by the rubric on our methodology page. Nothing here has been bench-tested. Prices are Amazon's own, refreshed daily, and never shown when we cannot verify them.

Pick 1 - VIAIR 40045

1.9/10★☆☆☆☆

VIAIR 400P-Automatic

Best for: 37-inch tires, or airing up without standing over the gauge

Verdict

Same pump figures as the 300P with a 30 ft hose, an automatic shutoff and a 37-inch tire rating. Buy it for the reach and the walk-away, not for more air.

What it does well

  • Rated for tires up to 37 in, with a 30 ft air hose - the longest supplied hose of the four
  • Automatic shutoff at pressure, so you set it and walk to the next corner
  • 33% duty cycle at 100 PSI and IP54, both published, same as the 300P

What it will not do

  • 2.30 CFM at 0 PSI is identical to the 300P - the extra money buys reach and convenience, not flow
  • 10.70 lb, the heaviest here, and still tankless so it runs no air tool
  • The supplied hose is not recommended in freezing conditions, per VIAIR's own page
How this 1.9 was calculated
MetricScoreWeightBasis
Air flow0.040%No CFM at 90 PSI published - scored zero rather than guessed
Stored air0.025%0 gal x 150 PSI = 0, on a 125-3,500 scale
Noise2.615%78 dBA, on a 58-85 dBA scale
Portability10.010%10.7 lb, on a 20-90 lb scale
Spec transparency5.010%3 of 6 useful figures published (CFM at 90, CFM at 40, dBA, duty cycle, recovery, weight)
VIAIR 400P-Automatic product photo

Product image from the Amazon listing for this model

$260.74View on Amazon

#ad Disclosure - price as of November 14, 2026

Published specs

VIAIR 400P-Automatic published specifications
CFM @ 90 PSINot published
CFM @ 40 PSINot published
TankNone (direct drive)
Max pressure150 PSI
Noise78 dBA
Duty cycle33% at 100 PSI (manufacturer-published)
RecoveryNot published
PumpOil-free
Motor12V DC, 30 A max draw
Weight10.7 lb
Power12V DC

Source: VIAIR 400P-Automatic portable compressor (part 40045) - product specifications

Pick 2 - VIAIR 300P

1.9/10★☆☆☆☆

VIAIR 300P

Best for: A 33-inch tire set that gets aired down and back up regularly

Verdict

The cheapest 12V unit here that publishes a duty cycle tied to a pressure: 33% at 100 PSI. That one figure is what you are paying the step up for.

What it does well

  • 33% duty cycle at 100 PSI published - a real figure at a real pressure, not a free-flow number
  • 150 PSI max working pressure and 2.30 CFM at 0 PSI, with a 25 ft air hose in the kit
  • IP54 and a sand tray with vibration isolators: built to sit on a trail, not in a glovebox

What it will not do

  • 8.70 lb and a 30 A draw - this is a battery-clamp tool, and it is no longer pocketable
  • Still has no tank, so it runs no air tool regardless of the 150 PSI on the box
  • Costs roughly double an 88P to fill the same 33-inch tires, just faster and for longer
How this 1.9 was calculated
MetricScoreWeightBasis
Air flow0.040%No CFM at 90 PSI published - scored zero rather than guessed
Stored air0.025%0 gal x 150 PSI = 0, on a 125-3,500 scale
Noise2.615%78 dBA, on a 58-85 dBA scale
Portability10.010%8.7 lb, on a 20-90 lb scale
Spec transparency5.010%3 of 6 useful figures published (CFM at 90, CFM at 40, dBA, duty cycle, recovery, weight)
VIAIR 300P product photo

Product image from the Amazon listing for this model

$158.89$224.9529% offView on Amazon

#ad Disclosure - price as of November 14, 2026

Published specs

VIAIR 300P published specifications
CFM @ 90 PSINot published
CFM @ 40 PSINot published
TankNone (direct drive)
Max pressure150 PSI
Noise78 dBA
Duty cycle33% at 100 PSI (manufacturer-published)
RecoveryNot published
PumpOil-free
Motor12V DC, 30 A max draw
Weight8.7 lb
Power12V DC

Source: VIAIR 300P portable compressor (part 30033) - product specifications

Pick 3 - Smittybilt 2780

1.9/10★☆☆☆☆

Smittybilt 2780

Best for: Re-airing a set of off-road tires when you would rather not pay VIAIR money

Verdict

150 PSI and 2.5 CFM published from a 1/3 HP direct-drive motor, with a 24 ft coil hose in the box. Smittybilt publishes no duty cycle at all, which is the trade.

What it does well

  • 2.5 CFM / 72 LPM and 150 PSI maximum output published - the highest free-flow figure here
  • 24 ft quick-release coil hose and a 10 ft power cord, so you reach four tires from one hookup
  • 1/3 horsepower oil-less direct drive motor; 13 lb with the nylon bag

What it will not do

  • No duty cycle published anywhere on the spec sheet, so how long it can run is genuinely unknown
  • 13 lb is nearly three times the weight of a glovebox inflator, and there is no tank
  • The 30 A inline fuse tells you it wants battery clamps, not an accessory socket
How this 1.9 was calculated
MetricScoreWeightBasis
Air flow0.040%No CFM at 90 PSI published - scored zero rather than guessed
Stored air0.025%0 gal x 150 PSI = 0, on a 125-3,500 scale
Noise5.015%Manufacturer publishes no dBA figure - scored a neutral 5, not a guess
Portability10.010%13 lb, on a 20-90 lb scale
Spec transparency1.710%1 of 6 useful figures published (CFM at 90, CFM at 40, dBA, duty cycle, recovery, weight)
Smittybilt 2780 product photo

Product image from the Amazon listing for this model

Check price on Amazon

#ad Disclosure - we do not publish prices we cannot verify

Published specs

Smittybilt 2780 published specifications
CFM @ 90 PSINot published
CFM @ 40 PSINot published
TankNone (direct drive)
Max pressure150 PSI
NoiseNot published
Duty cycleNot published
RecoveryNot published
PumpOil-free
Motor1/3 HP, 12V DC
Weight13 lb
Power12V DC

Source: Smittybilt 2780 universal air compressor - product specifications

Pick 4 - VIAIR 88P

1.7/10★☆☆☆☆

VIAIR 88P

Best for: Topping up and re-airing tires away from a wall outlet

Verdict

A 12V tire inflator, not a compressor. 120 PSI max with a 25-minute duty at 30 PSI. Buy it for the car, not the garage.

What it does well

  • 120 PSI max working pressure covers car, truck and trailer tires
  • 1.97 CFM at 0 PSI published, with a 25-minute duty at 30 PSI - the pressure tires live at
  • 4.75 lb with a 10 ft power cord and 16 ft air hose

What it will not do

  • No tank, so it cannot run any air tool at all - not one
  • 20 A draw and a published 25-minute duty at 30 PSI: four tires, then let it cool
How this 1.7 was calculated
MetricScoreWeightBasis
Air flow0.040%No CFM at 90 PSI published - scored zero rather than guessed
Stored air0.025%0 gal x 120 PSI = 0, on a 125-3,500 scale
Noise1.515%81 dBA, on a 58-85 dBA scale
Portability10.010%4.75 lb, on a 20-90 lb scale
Spec transparency5.010%3 of 6 useful figures published (CFM at 90, CFM at 40, dBA, duty cycle, recovery, weight)
VIAIR 88P product photo

Product image from the Amazon listing for this model

$89.89$103.9514% offView on Amazon

#ad Disclosure - price as of November 14, 2026

Published specs

VIAIR 88P published specifications
CFM @ 90 PSINot published
CFM @ 40 PSINot published
TankNone (direct drive)
Max pressure120 PSI
Noise81 dBA
Duty cycle25 min at 30 PSI (manufacturer-published)
RecoveryNot published
PumpOil-free
Motor12V DC, 20 A max draw
Weight4.75 lb
Power12V DC

Source: VIAIR 88P portable compressor - product specifications

The underrated number

Hose length, and why it is the spec you will notice daily

All four of these pumps clamp to the battery, which means the machine lives at the front of the vehicle while the tires are at four corners of it. The air hose decides whether that is one setup or four. Sixteen feet reaches the front tires of most trucks and not the rear ones; 25 to 30 feet usually reaches all four from a single position.

That is the real difference between the 300P and the 400P-Automatic, because their published flow and duty-cycle figures are identical. Five more feet of hose, an automatic pressure shutoff so you are not standing over a gauge, and a larger pump assembly rated for a bigger tire is what the price step buys. If your tires are 33 inches, the 300P does the same work.

The power cord matters for the same reason in reverse: a short air hose with a long power cord lets you move the pump instead of the hose, which on a truck bed is often easier. The 88P ships 10 feet of cord against the VIAIR kits' 8, which is part of why it works on a vehicle with an accessible battery.

One practical note on all of them: run the engine while you work. These pumps draw 20 to 30 amps, and a long air-up on an unsupported battery is how a trail recovery turns into a jump start.

Published air demand at 90 PSI
ToolCFM @ 90 PSIAt loadDutyWhat the number means
Tire inflation2-IntermittentBoth references agree on 2 CFM. Note the working pressure: you are filling to 35 PSI, not 90, so almost every compressor delivers more than it needs to. Tires are why so many people overbuy - the job is easy and the marketing is not.

Where two references publish different figures, both are shown rather than averaged into a number nobody published. Primary sources: Ingersoll Rand air consumption chart, Engineering ToolBox air tool consumption, and per-tool manufacturer specifications.

Set expectations here

What a truck compressor will not do

None of these four will run an air tool. There is no tank, so there is no stored air for a tool to draw on, and the flow at tool pressure is a fraction of what any tool asks for. A 150 PSI rating on a tankless pump and a 150 PSI rating on a six-gallon tank are the same number describing completely different machines.

If you need an impact wrench in the truck - for a trailer, a boat, roadside work - the honest options are a cordless impact wrench or a small tank compressor run from an inverter or a generator. Our mobile-mechanic page covers the second route properly, including why a six-gallon machine at 4 CFM is the realistic minimum for tool work away from a shop.

A lot of truck owners sensibly own both: a 12V pump that lives behind the seat for tires, and a tank compressor in the garage for tools. They are not competing purchases, and the 12V one is the cheaper of the two and the one that is with you when a tire is soft on a Sunday.

If you have a dual-wheel truck or a trailer with inner duals, add a dual-head air chuck to the order. Reaching an inward-facing valve with a standard chuck is the one part of the job the pump cannot help with.

FAQ

Questions people actually ask

What is the best portable air compressor for a truck?

For tires above 33 inches, the VIAIR 400P-Automatic: 150 PSI, a published 33 percent duty cycle at 100 PSI, 30 feet of hose and a VIAIR rating to 37-inch tires. For a half-ton on factory tires, the VIAIR 88P at 120 PSI and 4.75 pounds is the budget pick and the one that stays in the truck.

How much PSI do I need for truck tires?

Light truck and trailer tires commonly run 65 to 80 PSI, and some LT and RV tires are specified higher. A 120 PSI pump covers all of those with margin; the 150 PSI units matter because the bigger pump shortens a long air-up, not because you will ever set 150 PSI.

Will a 12V compressor run an impact wrench in my truck?

No. There is no tank, so there is no stored air for the tool to draw from, and the flow at tool pressure is far below what an impact wrench needs. For tool work away from a shop you need a small tank compressor on an inverter or generator, or a cordless impact wrench.

Can I plug a truck air compressor into the 12V socket?

Not these four - they all ship with battery clamps, because VIAIR publishes a 20-amp draw for the 88P and 30 amps for the 300P and 400P-Automatic, and Smittybilt ships a 30-amp inline fuse. A 12V accessory socket is a light-duty circuit and sustained current at that level is not what it was built for.

Is the Smittybilt 2780 good enough for a truck?

It publishes the highest maximum output of the four and a 24-foot coil hose for less than the VIAIR 300P, so on paper it is good value. The reason it ranks below the VIAIR units is one absence: Smittybilt publishes no duty cycle at all, so how long it can run is a question the brand has not answered in writing.

Sources

Where these numbers come from

  • VIAIR 400P-Automatic portable compressor (part 40045) - product specifications

    Fetched 2026-11-06. VIAIR publishes part number 40045, 150 PSI max working pressure, 2.30 CFM at 0 PSI, a 33% duty cycle at 100 PSI, 30 A max amp draw, 10.70 lb net weight, 10.9 x 5.8 x 7.5 in, a 30 ft air hose, an 8 ft power cord, dual battery clamps, a 40 A inline fuse holder, IP54 ingress protection, 78 dB at 0 PSI and a rating for tires up to 37 in. The page notes the supplied air hose is not recommended in freezing conditions.

  • VIAIR 300P portable compressor (part 30033) - product specifications

    Fetched 2026-11-06. VIAIR publishes part number 30033, 150 PSI max working pressure, 2.30 CFM at 0 PSI, a 33% duty cycle at 100 PSI, 30 A max amp draw, 8.70 lb net weight, 9.0 x 4.9 x 7.5 in, a 25 ft air hose, an 8 ft power cord, dual battery clamps, a 40 A inline fuse holder, IP54 ingress protection, 78 dB at 0 PSI, a permanent magnet motor, an ambient range of -4 F to +158 F and a rating for tires up to 33 in.

  • Smittybilt 2780 universal air compressor - product specifications

    Fetched 2026-11-06. Smittybilt publishes part 2780 (alt PN SB2780), 2.5 CFM / 72 LPM maximum output, 150 PSI maximum output, a 1/3 horsepower oil-less direct drive 12 V motor, 13 lb, a quick-release 24 ft coil hose, a 10 ft power cord, a 30 A inline fuse, heavy-duty clip connectors and a nylon carry bag. No duty cycle is published.

  • VIAIR 88P portable compressor - product specifications
  • Ingersoll Rand - Air Consumption Chart for Automotive Service Shops

    Figures are for average service-shop usage. The chart carries its own caveat: "Always check with tool manufactures for actual air consumption of tools being used. The above is based on averages and should not be considered accurate for any particular make of tool."

  • Engineering ToolBox - Air Tools, Air Consumption

    Tool-class consumption at roughly 90 psi. The table states its own basis: "The ratings are based on 25% load factor - or tools running 25% of the time. Full performance requires 4 times the volume."

Accessed September 2026. If a figure on this page does not match the manufacturer's current sheet, tell us at contact@psiandhose.com and we will correct and date the change - see our editorial policy.

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