First I changed the pedals to clipped in. The Shimano M780's are quite lightweight and more or less the same weight as the original Brompton pedals...perhaps even a tad lighter.
Next the saddle. The 530g Brooks was replaced by a Specialized racing saddle that saved me over 300g. I have to say that this saddle is surprisingly comfortable! It's titanium rails allow a certain amount of flex that keep things stiff but allow vibrations to be dampened. It is quite effective in this regard. In addition to this gel sacs are strategically placed at vital areas to add further help.
Today I changed the standard Marathon tyres that I ordered with this bike and replaced them with the slick Kojak tyres I had bought and only used once at the indoor Nocturne. When I had finished fitting them the bike felt very light when compared to my Original Orange Brompton. (And that was with the Hope Vision 1 front light and Garmin Edge 510 attached).
Going out on a little test run the bike felt fast, nimble and a different animal to what it had been before. The Kojaks grip the road well and the reduced rolling resistance is palpable with each turn of the pedals. They also reduce the weight by 400g.
As for the pedals I have to report that I really, really like them. It is still a bit of a learning curve but when going back to the standard pedals on my Original Orange Brompton they don't feel right somehow?
The next step will I suspect for me to take the mudguards and front carrier block off. This will reduce the overall weight by a small amount but it will create less drag.
This is all quite ridiculous I know with all this weight watching but this is quite an addictive game. Will it all male me faster? Almost certainly not!! I do wonder however whether when I next try to ascend something like Ditchling Beacon or tackle the 120 miles of the infamous Dunwich Dynamo whether carrying less weight will assist me? I think it will.
The data for my test run is as follows:
Distance: 6.47 miles
Average speed: 16.77
Maximum speed: 27.84 mph
Ascent: 164 metres