Portable Air Compressor for Truck and RV tires

Another vote for Viar. Love that little Compressor.

pianotuna wrote:
How long to get from 65 lbs to 80 lbs with the Viair on tires for a Class C? Tire size 235/85r16

About three minutes for the 265/70 17's I my truck. Maybe less. That's to get from 50 to 80.

mtofell1 wrote:
Aside from PSI look at CFM (cubic feet/minute). A high PSI w/low CFM will leave you standing for an hour waiting to pump up a tire. I haul a Craftsman with me that probably weighs 20 lbs. or so. It only runs off of AC so you must also have a generator. The small black lunchbox size DC compressors are handy but you'll be at least a year older by the time your tire is inflated.

Viair 400 specs
12 VOLT - 150 PSI Max Working Pressure, engine must be running during use.
2.54CFM Free Flow @ 0 PSI. This unit has a built in pressure switch which keeps the air line inflated at 150PSI.
Powered direct to the car battery with alligator clamps, comes with a 40 amp in-line fuse.
Great for inflating tires up to 35inches on off-road and agricultural vehicles.

I feel that I generally get at least 1-2 CFM at working pressures.

TakingThe5th wrote:


Viair 400 specs
12 VOLT - 150 PSI Max Working Pressure, engine must be running during use.
2.54CFM Free Flow @ 0 PSI. This unit has a built in pressure switch which keeps the air line inflated at 150PSI.
Powered direct to the car battery with alligator clamps, comes with a 40 amp in-line fuse.
Great for inflating tires up to 35inches on off-road and agricultural vehicles.

I feel that I generally get at least 1-2 CFM at working pressures.

That sounds like a pretty nice unit... the Craftsman I spoke of is only 3.0 CFM. The small DC type I have doesn't have a CFM rating that I could find but it's probably pretty minimal. I mainly just use it for pumping up kid's basketballs and whatnot.

I also carry a decent sized Craftsman 120 volt compressor. Works fine for all my needs.

Another vote for the Viair. I'm ordering mine tomorrow. :)

If you are thinking about a Viar Compressor there are two models to consider, the 400 and the 450. Before my purchase I called the tech support at Viar and told them I had 22 inch tires and they strongly recommend the 450 due to the 100 % duty cycle. The 400 has a 30% duty cycle. I purchased the 450P model based on the tech's advice.

Just something to think about.

This is what I use - purchased at Lowe's when it was on sale. Would not be without one. For home and RV use. Made a little "shelf" for it to sit on in the storage compartment.

PORTER-CABLE 0.8-HP 6-Gallon 150-PSI 120-Volt Pancake Electric Air Compressor.

http://www.lowes.com/pd_349204-70-C2002_1z10r75Z1z13y07__?productId=4764588&pl=1

http://www.amazon.com/PORTER-CABLE-C2002-Oil-Free-Pancake-Compressor/dp/B000O5RO1Y/ref=sr_1_1?s=hi&ie=UTF8&qid=1443451031&sr=1-1&keywords=PORTER-CABLE+C2002

drfife wrote:
Slime 40026 2X Heavy Duty Direct Drive Tire Inflator

I had the next size smaller Slime compressor and it threw the pump rod on the sixth or seventh time I used it.