Ordered it to put air in my boat trailer tires, they are large 16" that run 80-90 psi, have always had trouble getting them filled, you can't get the trailer into most air hoses, and even if you do they don't have the pressure.

Hooked this thing up, you turn it on, it comes up to pressure and shuts off, then squeeze the trigger to put air in and it kicks right off, was able to bring the tires up to 90 psi in just a few minutes each. Not starting from scratch, they already had just over 80 psi, but it is always that last bit to get them up to 90 that is so hard. This thing just pumped them right up, it is very quiet, doesn't vibrate around at all, just sits there and hums and away you go. It gets warm, but it wasn't excessive, just a few minutes and I could put it back in the case.

I will say the case is very nice, holds the compressor and two extension hoses that are high quality, but it takes up a lot of room. Not sure how to best carry it in my truck.

I have several VIAIR pumps. Unfortunately the last one was stolen. I believe this one will be my favorite for the following reasons. Number one is the auto shut off. Many units require that you return to the pumps to shut it off. In the past I would over fill the tire, return to the pump, shut it off and then return to the tire and reduce air to the proper pressure. Doable but extra effort. Number two is the continuous run cycle. Many units can run for 15 minutes then require a 30 minute cool down time. While maybe not important to some why risk it and have the auto thermal protection shut it down and wait 30 minutes. As an added bonus I suspect to get the continues run time the rpms on the motor have been reduced and the unit is pretty quiet. Number three the supplied air gun has a bleed off button which allows you to reduce air pressure easily if you over fill. Number four the unit comes with two hoses, the extension for dully tires and the air gun with gage so you are ready for most anything. Number five the whole package is small enough to fit under most SUV's back seat. It is high quality and not cheap like some you see in some discount stores and gives you a "get to the tire store" back up as well as avoids you having to locate a gas station with an air pump, chunk in quarters and hope it works for a simple air top off. About the only downside I can see is because the gage goes to 170 if you routinely fill passenger 32 LBS tires you may want to add a smaller scale gage for a bit more accuracy. My package also came with the screw on valve connection. Very solid but if you do a lot of tires the "flip down" one would be quicker. It is available separately. Note the hoses I got were black which I prefer.

Works great! Does just what I expected!

I originally purchased one of the lower-cost portable air pumps (100psi, 10-minute runtime before overheating). I figured it would be able to handle filling one 275/60R20 pickup truck tire. I was wrong. After 10min of running, that pump went from 15psi to only 34psi with a target of 40psi. Even the airline was too hot to touch. Fail. Enter the VIAIR 450-P that arrived today. Same tire, starting at 15psi... it took the VIAIR pump just over 2 minutes to inflate the tire to 40psi. Immediately after, I filled the other three tires from 35psi+/- up to 40psi, each very quickly. The pump body never raised in temperature.

The entire package seems to be good quality. I was a little worried that the coiled airlines were too rigid, but they're not. With the pump at the front of the (Crew Cab) truck and hooked to the battery (truck running), 1 airline easily reached to the rear tires. The VIAIR pump is much quieter than the my cheaper pump. The auto turn-off when you're not filling a tire is a nice feature. The air gun also has a button to release air, if you go too high. The bag has extra room for tire plugs, etc. Mine also came with 2 extra air filters for the pump.

There's a few comments about having to hold the trigger while filling the tire. True, but the 450-P pumps up the tire fast enough that it really isn't an issue (for me). The air gauge is off about 1-2psi, but it's not built to comply to rigid engineering standards and regulations. It's an air gauge for the masses, and mine was very close. Except for the price, I can't knock this VIAIR pump... but I'm willing to pay for the proper tool for the job.

Works amazing easy to hook up to my truck batteries and the kit as a whole is perfect for my needs. I have a large RV and six large tires that nee to be checked all the time. This compressor fills my tires to 100psi in seconds. I have had to inflate a flat tire a couple of time and the compressor just ran and ran no over heating no slowing down just smooth running. The bag it comes with is very nice canvas I have dropped it in the mud a couple of times and just hosed it off. The hose work great you can couple and uncouple with one hand " with a little practice" The gauge on the air gun was bad I called for a new one and never receive it. I use a different gauge so big deal but for the money you pay for this every piece should be primo.

Viair has been recommended to me by so many RVers! I finally broke down to get this one. My RV tires require 110 LBS of pressure (4 tires), and this will do the trick. My camper came with an "on-board" air compressor.... but it's too "sissy" to air up it's own tires! It was only intended to use for toys, bikes, pool blow-ups, etc., not the camper's tires. SO disappointing that one needs to have 2 air compressors. If there's a way, I will remove the compressor that came with the RV and use the viair only. I've already used it to help me winterize the water system. Amazing tool, amazing bag, great product!

Most capable air pump I've ever owned. Works great and includes useful accessories.

Pulling a 43 foot 5th wheel from NY to Florida every year and back again. You start in Florida with 110 PSI, as you get closer to Pennsylvania, you may only have 90 PSI due to temperature changes. Or you may have had 110 PSI when you got to Florida, but after being there for 5 months, the tires lost a little air.

I read many reviews and recommendations and knew that the typical car tire inflators were not going to be up to the task. This unit was recommended by a number of RV sites, and I have been very pleased with it. The 1 hour continuous duty was important to me in that I have 4 tires on the RV at 110 PSI and 6 tires on the truck at 80 PSI. I can quickly top off all tires and don't have to worry about maneuvering in truck stops to find a working air hose.

The included hoses (one 30 foot, and one 30 foot extension) are more than adequate to reach all tires on the truck and RV and everything that you need is included in the bag. The compressor is solidly built and about what you would expect noise wise. The bag is fairly bulky due to the compressor size, but that is to be expected.

I really struggled with the cost, but in the end felt that this is one of those things that you truly get what you pay for. I have no regrets in purchasing this Viair 450 P RVS compressor.

When we bought our Ford F-350 Dually and a fifth wheel trailer, I bought a CAD$80 (~USD$60) dual 12/120v air tire inflator. The first time we needed to use it, we found out how slow it was. We needed to raise the air pressure in our four big trailer tires from about 90 psi to 110 psi, with one tire at just 57 psi. It took nearly a half hour to do this, and was so slow that I settled for just 100psi--our friends were waiting for us to finish before we left the meeting point and headed on our way. I was determined not to repeat that frustrating experience. My next purchase was a much faster 12v tire inflator for about CAD$150 (~USD$112). It was much faster and certainly addressed the frustration problem. However, after about an hour's total use, the plastic part that clamps on the valve stem blew off the end of its hose. I was able to get a free replacement under warranty, but after a mere half-hour of use, that one started blowing its fuse every time I used it, rendering it useless. So, I decided that I had to find one that was highly rated and would last. After my experiences with these other ones, I was willing to pay for a good quality tire inflator. Well, the Viair 450P-RV is exactly what I was looking for. It comes with all the attachments you need. It has a long coiled hose and a second extension coiled hose so that you can have the compressor near the front of the truck or trailer to reach the battery in either one yet still be able to reach back to the tires. I was even able to use the battery in my truck and reach all the way back to the trailer tires on our 36-foot fifth wheel. Overall, we're very happy with it.

One caveat--we've only got about an hour's use on it so far. From all the reports I've read, it's very reliable so I'm not worried about that at all. However, I can't personally testify to its longevity.

A great product, and I really wish we'd bought it much earlier!

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This bad unit has the power to inflate my diesel pusher motorhome tires. This thing is small, portable, light weight, and very powerful. Very high quality material. You need to connect it directly to the vehicle battery - there is no standard power plug. I use in conjunction with a digital gauge to verify pressure. The included chuck works very well with dually tires. This thing is expensive but high quality. Properly inflated tires makes a huge difference in vehicle handling. Very happy with this purchase. Highly recommend.

Excellent Compressor. Works very well fro my RV. Inflates tires very rapidly, and can reach the back tires and the trailer tires as well. Solid construction and very well made.

The Viair RV compressor arrived on time and undamaged. I have only used it one time to top up my 80 psi tires. The Viair was very fast and then packed away in it's case without difficulty. I can't speak to it's speed, filling higher pressure tires, but I would recommend the Viair 45053 450P-RV.