Summary this is a simple wheel for inline skate, can be printed with a double extruder with rubber (TCP flex is better) and ABS, PLA or NYLON for the inside wheel; or can use the old rim to rework the wheel with resin like sintagom 703/80 reasult shore A 80/82 wheel Instructions 09/04/2015 i have upload a new mold for the rubber, with better degassing system and less plastic used (about 50g of PLA each part of the mold if 30% infill 4 perimeters) data for molding with sintagom: mold weight: 100g wheel weight: 44.2 rubber weight: 26.5 rubber + wheel weight: 70.7 sintagom: 30g part A 12g part B (a bit in excess for stay sure)