Hi,
The frame and forks are hi-tensile steel as it most of the rest of the bike. The only
alloy parts are the handlebars with its post and the rims, (and the bar-ends I added).
(And the brake levers - I broke one of the original plastic brake levers
by accidently letting the bike fall over, they didn't fail in any sense.)
£5 a pair delivered.
I agree the frame hinge is probably very dodgy if you were folding the bike say 12
times a day. In fact all the folding adjusters would be a pain except the fronttube
hinge, as they have to be set very tight not to slide in the plastic bushes used.
(The hinge is steel - and fairly basic - cant see any bushes - but seems to work.)
I'm under no illusions that it is a cheap bike, but it does look at first glance
somewhat more expensive than it is, and TBH set up properly it rides quite well.
Fortunately I don't have to fold it for everyday use. Given that,
at a barrel scraping price I think its actually quite good.
rgds, sreten.