Vlad, I was looking at a self-contained rechargeable battery-powered compressor in Aldi today - about $35. I was thinking of it for bike use. The specs say it will inflate a car tyre in 7 minutes.
I can't find it on their website. I'll check it tomorrow.
A friend bought a cheapish 12v compressor and stripped all the plastic off it and has that stuck under the seat of his bike.

