Ice race wheel for RC touring car

Update 16-01-2020:
Time for the new design. It takes into account the lessons learned last year, or so it seems. We won’t know until race day. It uses 0,8x12 steel nails. I print the wheel at 104% in X and Y, and 92% in Z. After printing I cut the heads of the nails and press them in using a piece of plastic cutting board (not to damage the tip). Then I bake them again which will hopefully anchor the nails in the wheels. It’s quite a tedious task, 192 nails (24 per wheel, two sets of four wheel