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I’m adding a mountain bike, looking for a bike to replace one I already own so really I’ll be 1 up, not down :)
PhilDAS-
I’m adding a mountain bike
Don't do it.
@Pawlus @miro_o That Schwalbe link is pretty good, basically rolling resistance keeps going down with wider tyres (at the same pressure!!) until you get to a perfectly round contact patch since the circumference 0f the contact patch is where rolling resistance is created and circle has the lowest circumference for it's area (and the area stays the same at the same pressure):
Jaap
Most people look for an excuse to own more bikes. Not less. Phil are you feeling ill?