Their FAQ (downloadable from https://michelinmedia.com/michelin-uptis/ https://michelinmedia.com/michelin-uptis/) does address this: > 21. What will happen if

Their FAQ (downloadable from https://michelinmedia.com/michelin-uptis/ https://michelinmedia.com/michelin-uptis/) does address this: > 21. What will happen if some small stones or mud or snow get in between the structure of Uptis? > The objective during the development of the commercial product is to test Uptis in all of these situations. Some preliminary tests show that stones, mud or ice/snow will not stay inside the Uptis structure. Obviously preliminary tests aren't anywhere near enough to prove it's a nonissue, though.