I was about to read your post up there until I saw "replace with tubular". Not sure if you know it or not but there have been a lot of "professional reviews" lately showing that tubulars are actually "slower" than clinchers. It's hard to believe but true. Do a search over on the roadie section of this forum.
I guess I'll just have to stick with the slow set up that I have.
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I may be fat but I'm slow enough to make up for it.