Schwalbe Winter (30-622): https://www.schwalbe.com/en/spike-reader/winter.html https://www.schwalbe.com/en/spike-reader/winter.html I rode a couple of kilomete

Schwalbe Winter (30-622): https://www.schwalbe.com/en/spike-reader/winter.html https://www.schwalbe.com/en/spike-reader/winter.html I rode a couple of kilometers on an iced lake some weeks ago without trouble. There's also the more expensive Marathon Winter: https://www.schwalbe.com/en/spike-reader/marathon-winter.html https://www.schwalbe.com/en/spike-reader/marathon-winter.htm... Marathon Winter has more studs. They're placed closer to the edge of the tyre and it's debatable how much difference if it makes if you don't lean into the curves. I try to lean less on frozen ground, so I suspect they would be pointless for me. Studded tyres actually works best on ice. Theoretically, if snow covers the ice they could be ineffective. I myself have not found this to be a problem.