I'm not a pro skater by any means but I love to skate fast. These wheels are very grippy over a lot of what i have skated on. I find it hard to do power slides with them, but they definately take you where you want to go at all speeds. I have the red and black ones.

My friend has these and they're super grippey. I can't wait to order mine.

at frist when i got these wheels i thought that they were ok and when i went skatin all my friend's were like though's wheels r not good at all and i should just throw them away..but it turns out now they wont my wheel's..mostly the boy's bc of how FAST i go on them there alway's comin to me sayin can i were your skate's i'm like ok until i wont to were them i love going FAST not SLOW so whoever think's they don't know if they should get these skate''s think twice bc i didn't like them at frist but now i can't stay off of them...well peace

Would these be good on hardwood for rollerderby?

omg....my name is toni these wheels are awsome till about a month..........then they start to chipp.........so yea ............