What for wheels do I need for downhill?

For Downhill, you will want to use wheels with square lip, big contact patch and usually some kind of supportive core. This type of wheels will allow you to grip corners, maintain massive amounts of speed, and slow you down in the shortest time. The size can be anywhere between 70-80mm and durometer from 74-83a

Favorites are Venom Magnums, Seismic Alpha, Cuei Killers.