6 bolt to 3 bolt wheel adapter

thingiverse

I built this to adapt a 3 hole Grant pattern to a 6 hole 70mm Mono pattern. The holes are only 5 mm so they can be tapped or drilled out to the desired size. In my application, I drilled out the 6 holes for thru-bolts into my direct drive adapter and then heated up some brass threaded inserts and press-fit them into the 3 hole pattern to receive my sprint car wheel. you can experiment with infill, but I found 60% to be stout enough.