I am considering these for my new fatbike and was wondering about the grip. They seem well made and are thin and don't look like they will pack up with mud and snow etc. I am on Canfield crampons now and they are great as far as grip goes (pointed screws) the Helvas are flat screws and I am wondering how well they grip compared to the Crampons. I mostly use 5/10 shoes but in the snow I use my Sorel conquest which have deep lugs on the soles. Anyone with some experience with the Helvas out there?