Originally Posted by
Gibsonsean
Hummingbird would probably represent the sweetspot if i was to prioritise low weight within the balance of other charactics important to me, though even then, price and folded size are outside my preferences.
-Both chedech bike (a full carbon clone of Brompton) or custom built full titanium Brompton clone are among the lightest (<15lbs or less) AND folds as small as Brompton without disassembly.
-Both Montague and Changebike framesets accept 27.5" / 700c full sized wheelset and strong enough for mountain biking. They can be rolled on front wheel too.
And they are fairly lightweight and can be easily built into ~16lbs hybrid bike or ~18lbs light mountain bike.
Helix in theory can be good enough for both, but we will see.