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https://www.bicyclerollingresistance.com/specials/conti-gp4000s-ii-23-25-28
This is glorious reading. Welcome to a new world. Get wide rims too for allll of the comfort.
yoshy
Contemplating going up to 28c from 25c on my pre cursa: for general road riding I reckon this is pretty sensible - anyone moved up and felt more sluggish as a result?