Dura Ace ring is a direct bolt-on option on the new B models(2013 and up); 130 BCD.
Loosing the pants protector/guard also saves weight. I did some weight comparos here:
https://www.youtube.com/watch?v=5AT6...IoDLA&index=16
Don't know of any other site to order Maxxis ultra light tubes. Read somewhere that the owner(Peter)
got them from Japan. I got some from Brompfication but haven't tried them out yet. Waiting on a front
wheel getting rebuilt - used 2013 superlight hub, titanium spokes and Velocity Aeroheat rim. Did I mention
both rim and Maxxis tube are presta and not schrader that B'ton uses?
Maxxis Ultralight Inner Tube 16-18 Presta by
1nterceptor, on Flickr
Birdy green block is firmer than B'ton's firm block; for me less energy wasted. Slight weight decrease:
Birdy vs Brompton Block by
1nterceptor, on Flickr
Kojaks don't flat easily while new; as the miles add up(and the tire gets thinner) -
flatting gets easier. Especially with glass. I'm assuming you'll be carrying spare tires?
Folding Kojaks are a nice option.
Some items I have in the closet but haven't gotten around to installing/trying out:
1. Ti Parts Workshop ti bottom bracket
2. Sram Red brake shoe/pad holder, ti bolts
3. generic carbon handlebars; remember my warning about unkown brands
4. Aeroheat rim w/ ti spokes, see above
5. Jagwire alligator type cable housing
6. KMC superlight 10 speed chain
More parts you may want to check into:
1. carbon seatpost
2. carbon cranks(older square taper Campy Record)