Originally Posted by jnb-rare

I've been putting some more K's on the bike and enjoying it a lot. Swapping out the tubes seems to have solved the "slow leak" problem. I've installed the 95 gm '6' instead of the 65 gm '6A' tube. Considering that the difference in weight is about 2 ounces for both wheels, one wonders why Dahon (or anyone) uses the 6A tube. It really seemed flimsy in comparison.

I haven't had any punctures with the Stelvios yet (fortunately). I'll need to ride them some more to see if I get used to the way they feel, or if I want to try Marathon Racers or something else. Many years ago I had a racing bike with tubulars for a while. I had been coming from a full touring bike with a relaxed frame geometry and wide tires. So I know that it takes time to make the adjustment to a quicker setup. This time I'm going from a mountain bike to the Mu SL, so the change seems even more dramatic.