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@edscoble
The 25c is right on the threshold with the Crest (IMHO) but it give a nice U shape profile rather than an bulb profile.
That and the ability to run a lower pressure too, making it feel more comfortable as if it's a 28-30c tyres.
I can tell you the disadvantage of such set-up - no pinch puncture, odd to label that as a disadvantage, but with no pinch puncture, may cause rims damage if hit an invisible pothole way too fast at a ridiculously low pressure (my own fault);
Luckily managed to save that rims by bending the lips, and filing it down carefully.