Im using Nokian Mount and Ground Winter. 160 studs.. its a 1.9" (N+1, I have a spare bike for the purpose)

'fast rolling knobby' is a bit of an oxymoron .. but as the studs are not down the center
they are good for Icy-snow and dry mixed street surfaces..



Another direction slick center band of the Continental Travel Contact , is flanked by a row of knobs on the edges..

they intend it for touring past the end of the paved roads , adventures