i'm running Schwalbe S One (30mm) in a tubular for rides that include some gravel.
i like the tire, better for most purposes than 32s with small knobs (which is as wide as i get on my drop bar roadies)
but it's not as fast as a 25mm.
Everything is a trade-off.
edit: if i need wider than cyclocross tires for a particular gravel ride, i take a mtn bike with at least front susp. Right tool for the job, as far as i'm concerned.
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Vintage, modern, e-road. It is a big cycling universe.
Last edited by Wildwood; 01-29-20 at 06:55 PM.