Originally Posted by
mkadam68
Sorry if nit-picking, and please take with a grain of salt, but in my head, 0.3mm--or 1/100th of the whole tire--is a stretch for "much narrower" status.

Have you ridden them? Can you tell the difference? It'd be somewhat amazing to me if I could (dead-end and all that).
Isn't that a 1.7mm difference?
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'14 carbon Synapse - '12 CAAD 10 5 - '99 Gary Fisher Big Sur