Call me a cynic, but I use any old wire-bead cheap crap (eg Vitorria Rubinos I've had lying around for years… those cheapo Stelvio things from Planet -X… all c.£10 ea?) and just let a few PSI out.
Most of my Winter riding/training is on wet, muddy, grit-strewn backroads, and most of THAT is in the dark… Cheapo wire-bead Halfords specials are as tough as old boots and, really, any extra rolling resistance generated or any grip lost, is negligible.
We are, after all, talking about a total of less than one-inch-square in contact with wet/muddy tarmac. I doubt whether very little visible tread in the centre will make any difference on poor and variable surfaces.
Just my 2p.