Originally Posted by
Raxel
No, it cannot be that light.
Here's some measured data:
Brompton steel parts (C-line): Main frame 1980 Fork 565 Rear triangle 755 Handlepost 755
Brompton titanium parts (T-line): Main frame 1207 Fork 276 Rear triangle 461 Handlepost 485
Aceoffix Aluminium (old version): Main frame 1470 Fork 450 Rear triangle 540 Handlepost 660
T-line frameset (titanium/carbon) is roughly 1.6kg lighter than full steel frameset.
I think your (T-line shaped) aluminium frameset will be slightly heavier than that.
I did weighed the aluminum frame, and compared it with T-line frame. Almost the same.
I think I forgot to calculate telescope seat posts (aluminum VS steel) and saddles (normal road bike saddle VS Brooks C17) of the two bikes, which cause approx. 400~500g weight difference.
I got several sets of these:
And this is the steel Brompton with similar components:
I do have lighter folding bikes (7.5kg titanium Brompton clone & 7.2kg Dahon Mu, for example), but now I am not that interested in extreme light weighting any more.
No heavier than 10kg is OK for me.