These new winter tires have studs that retract as it warms up Clever polymer science and a little robotic precision created the Hakkapeliitta 01. https://arstechnica.com/cars/2026/03/these-new-winter-tires-have-studs-that-retract-as-it-warms-up/?utm_brand=arstechnica&utm_social-type=owned&utm_source=mastodon&utm_medium=social