The Continental Spike Claws, at 2.1", are wider than the Nokia Mount & Ground (thanks, Leebo) or the Schwalbe Winter 100 (thanks, Kingston), so although I hear what corrado33 said about a narrower tire slicing through, these are the top contenders, so-far: https://www.niagaracycle.com/categor...SABEgI4x_D_BwE