Interceptor: Oh, it's just the chain ring. I thought it's the entire crank + bottom bracket. But WOW, 89gr to 33gr is quite a change for the chain ring alone.
For the suspension block I'm using this one:
http://novdesign.co.kr/racing-shock-4/
Kojaks vs Marathons is a no brainer for me. On that bad roads and highways (burst truck tires wires) I'm going to rely on the flatproof part of the Marathons way too much. And they last up to 10k kilometers. I'm not carrying spare tires.
Dahon.Steve: Thanks for the link. I'll write the guys at Brompton and ask about it.
shrooms: Mostly for fun. Brompton is the first name that comes to mind when talking about folding bikes, it's the most iconic. At least here in Europe. I try to tour on a different type of bike every year. I had a hardtail MTB, a FS MTB, a hybrid, a cyclocross, a city bike and a road bike. Now folding bike, afterwards... fat bike? Trike? Unicycle?