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Dunno. I wouldn't ride Open Paves in the winter in DK, but if you wouldn't mind doing it in the UK, I guess I see no reason for not giving the Challenges a go. Weird logic perhaps. I just thought puncture protection would be the same, as they seem to have similar weight, thread pattern and size.
PR: 300 tpi, 27mm, 285g,
OP: 320, 27mm, 285g,The lower tpi on the PR suggest to me that, although not a lot, sidewalls will be tougher. And they state: "Road / Cobble / Gravel Racing / Big Riders" Which sounds like me
Isn't the puncture protection a bit shit on the Challenge PR's?