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I know this was posted last year, but this might help someone else...
Get the largest you can afford, don't trust a salesman....
Get one with an upright tank....unless you plan to put it in the attic (don't laugh, I've seen it done)
Get a belt drive NOT direct drive...it's quieter....
Install pipe in your garage or wherever, so you will have outlets where you can hook up a hose.. in the several places you might need to use a hose.
install a dryer/oiler at the tank...you don't need to keep it full of oil...only when you use air tools...
if you cannot afford a 150 PSI 25 gallon tank, get what you can, if you run out of air too soon on a frequent basis, install a well pump tank....but they can be even more expensive...
Don't forget to drain the water from the tank on a regular basis....
a well installed pump/conduit/hose will not lose air pressure.
quick releases should be premium quality....
If you are only using it to add air to your tires a small 100 psi (construction jobber) will work for you. (noisy)
For drying a bike? largest one you can afford, 1" conduit to where you will be drying,... shortest, largest diameter hose you can find..
It'd be cheaper to buy a premium bike dryer... You can get them at your local H D dealer!
Personally I use my yard blower.... but I also have an air compressor in my shed that is piped to my carport. I wish it was a belt drive and I wish it were more powerfull and I wish I'd used larger pipe. I do use air tools on occasion.
IMO get the biggest tank you can afford & have room for. Usually you'll end up buying more air tools & you don't want to hear that motor running all the time>
FWIW, I got a 1.6hp 160psi 26gal upright from Sears on closeout for $128 several years ago with 3 tools and hoses included. I bought it to blow out my yard sprinkler that the landscaper was charging me $65 to do. So it paid for itself in 2 years. It is just big enough to run tools. I would get a 3-5hp 50 gal next time.
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