Shark Wheel drive for electric skateboard

thingiverse

This is my first foray into electric skateboards. I liked the Shark Wheels because they work very well on the streets around me and I decided to try to drive them with custom 3d printed parts. I got a few good runs until things started to fail and I don't think they can be fixed easily. * The pulley has nothing solid to contact so it can be hard to get aligned. This requires the belt to be tighter. * The pulley is too far away from the bearings. This gives the belt more leverage to pull the pulley into the trucks during hard acceleration or braking. * The angle on the pulley forces the belt off its track. For as tight as I had it this snapped the metal bands as it moved out. * The wheel is too small for an electric skateboard. I can't give it any more clearance around the truck. The ride was great there's just not enough room to make this work reliably. For the time being I'm switching to bigger wheels designed to have pulleys attached. If they ever make a version larger than 70mm I may try this again. I'm also including my motor mount in this posting since I think the next version will be very different. The big cylinder is a drill jig for drilling holes for the bolts through the wheels.