I roll with 25mm folding gatorskins. I'm happy enough with them that so far I find no reason to change. I've used wire bead models in the past which are pita to install and harsher riding that folding. The ride quality isn't as good as kryllions and nor do thy grip as well esp in wet but that's ok with me as I'm on commuting duty so I want reliabilty above all else. Longevityis also a side benefit.