Originally Posted by Russ Roth

Bearings were overhauled and adjusted when the bike was bought to make sure the hubs were properly adjusted, usually they're too tight from the beginning. The factory rim is a singlewall which is probably the lightest option really.
I've also heard really good things about the WI freewheel for speed and quality.
I'd mostly keep the wheels on the ground but I've been playing at the pump track and trying to get the wheels off the ground.