The Mara. Winter stud pattern is such that the four rows of studs are mostly to the side of the contact patch when the tire is inflated to the max. PSI — so, the rider increases PSI on clear road days to minimize rolling resistance. On icy days, the rider drops the PSI to bring all four rows of studs into the contact patch. I put them on my commuting bike in early Nov. and leave them on till the snow is gone for good. I just alter the PSI to optimize them for the current conditions. They have high rolling resistance, esp. when I drop the PSI, but, partly as a result, I come out of winter strong.
1) Always ride cautiously and within your capabilities, even with amazing cool new equipment.
2) Studded tires require skill and attention as does any tire under any condition. They’re not magical, though I wish they were. A studded tire will slide on deep slush; so will a crampon. Also, as with any piece of equipment, it takes practice to learn how to use them well.
3) Cars/trucks may move unpredictably and uncontrollably on icy and snowy days, sliding sideways, backwards and forwards and also may not be able to see well through fogged windshields and falling snow. With studded tires on an icy road, I may have more control than the nearby drivers and this creates a new hazard.