Check out the Facebook pages of Bromtpon clubs from Korea and Singapore.
Those folks are obsessed with getting the Brompton's weight as low as possible.
Some are in the 7kg. range. Be careful when swapping parts to make them
lighter. There have been reports of ti posts breaking(London Brompton Club) to
carbon handle bars cracking(Brompton Club of the Philippines). One company had
a recall for their light hinge shells(NOV Design?) Is your bike a X/superlight model?
Most of the modifications I've done are to make my bike lighter to carry. Although
some ti bolts are nicer to look at than the rusting Brompton steel bolts; brake pad
holder, handle bar, upper stem catch, etc. Most of these swaps were done 2 years
ago. Some shots with weight comparisons on my Flikr account:
2013 Brompton S6L-X by
1nterceptor, on Flickr
1. Brompfication ti post, regular/standard lenght(almost have the weight saved over original)
2. Brompfication seat clamp quick release
3. Brompfication front wheel skewer
4. Ti Parts Workshop suspension ti bolt
5. Ti Parts Workshop 6 speed Hub Nut set
6. NOV Design carbon hinge clamp lever/ ti bolt
7. NOV Design carbon stop disc/ ti bolt
8. NOV Design ti rear clip
9. Shimano Dura Ace chain ring/wheel 10 speed
10. Shimano Ultegra chain 10 speed
11. Shimano Dura Ace magnesium brake pad holders, ti bolt
12. Xpedo M Force 8 ti pedals(half the weight of original)
13. Selle Italia SLR carbon seat with ti rails(half the weight of original)
14. Birdy green suspension block
15. etc., etc.
Some weight comparos in my video; tires, X/superlight wheels:
https://www.youtube.com/watch?v=8szh...6zPoymgKaIoDLA