I have tried the JB Blues on three different bikes, and I disliked how they felt more than I've ever disliked any tire. Subjective, yes, but I thought they felt dead and slow. No scientific analysis to back that up. When I went to Paselas, or in one case some old Conti Top Touring 2000, I perceived an improvement in "liveliness" and speed. I suspect the JB Greens are beautiful to ride, and people I trust on these matters have confirmed that this is the case. The Blues seem tough and puncture-resistant, though, so may be appropriate for cyclers who prioritize durability and reliability.
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