Scooter Yak Wheels For Sale Do I Need To Buy Bearings Along With These Scooter Wheels?

Do I need to buy bearings along with these scooter wheels? - scooter yak wheels for sale

I buy a moped wheels.
Rear:
http://www.baysideblades.com.au/inline_s ...
Width:
http://www.baysideblades.com.au/inline_s ...

I have a razor pro with all the parties who came with her.
I have to buy rolls?
Are they coming with them, or even the standard can pin wheels professional use?
I'm looking for more speed and can glide over, it is worthwhile to buy more stock?
Perhaps these?
http://www.baysideblades.com.au/inline_s ...

Thanks for any advice:)