High density 'kneeling pad' foam ready for sanding to correct profile. The hubs are made from thin ply (about 2mm), held together with 5 long 3mm bolts. The axle 'bearing' is a 1/2" plastic hose connector, chosen for it's 10mm ID which matched the 10mm OD of the carbon fibre axle on the Fly Baby. The large 12mm bolt through the upright wheel is for mounting in the drill press for sanding the profile (see next picture).
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