Bike Friday/Brompton are steel (there is a BF for $700 that comes up on craigslist near you). This, however is aluminum, very lightweight, and a very well regarded bike. https://newyork.craigslist.org/mnh/b...819168939.html If you can get to NY to test ride it, you might just love it. I personally own a Bike Friday as my main bike, but I snagged a Dahon Mu Uno (same as the one in NY except single speed) and I am astounded on what a great bike it is! Rock solid, lightweight, and it is now my rainy day bike since it is pretty much impervious to bad weather (saving my BF from getting wet). I just hose it off when I come back from a wet muddy ride and it shrugs it off with no ill effects. That's a great price on the Dahon Mu P8....they sell in my area (S.F.) for $600 used.