i used to speedskate so i know alot about there wheels, personaly i like the urethane on speed skating wheels better, but they just dont have alot of metal cores because when you have 8 its like wearing some big bricks on your feet. Npc's hot glued are really good, just weak, but good urethane, the og matters ( plastic full core with little slots taken out, hard to find there out of bussiness) cato motus has some nice spoked metal cores and so does powerslide, you just have to look around it's hit or miss.