I'm off to ride Penmachno tomorrow but leave later this afternoon. The forecast is for wet weather.
I currently have two wheel/tyre combinations to choose from as my wife isn't going.
So I currently have Racing Ralphs front and rear on my Crests or could swap to Nobby Nics on Arches (but would need to change rotors, cassette and hub adapter).
Should I bother changing (I've not been to Penmachno before).
They're 29er by the way.
Thanks - I don't have much time to decide as I'd have to get going immediately if I want to change.

