I just want to give a shout out to how much i really like my new schwalbe marathon winter tires. they had their first real taste of sustained ice today (there's a stretch of chicago's lakefront bike path that gets inundated with lake waves that then freeze into a thick layer of ice). last winter i rolled on schawlbe snow studs (half the stud count of marathon winters), and they were not the best for long sustained ice sheets (i went down a few times), but the marathon winters performed flawlessly this morning. they really are the prefect tire for my winter commuting where ice is public enemy No. 1.