I expect the same rubber is used in Schwalbe studded tires as with the rest of the Marathon Line.. ( have some of the touring tires)

Suomi Nokian, tires I got , used a harder Rubber compound,, part of why they retain the studs.. so well, and wear so little..

Used a 622-40 tire , on a 9 month bike tour,* their A9 a studded utility tire just minus the studs.. when I came home they still looked like new..

* SW Ireland, to NE Scotland.. in 97..





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