The size and softness means a lot about how smooth your ride is going to be and the Boosted 105s are both.
The new wheels from Boosted are made to cruise the worst surface worry-free. You can easily swap them with the normal pulleys that you get with your Boosted Board.
The Boosted 105s got launched together with the Boosted Beams, the new lights for Boosted boards.
The Boosted 105s and Beams got their own mini-party in NYC