1. Billionaires don't use their own golf clubs. Someone provides them with whatever Tiger is using when they show up to the tee.
2. No one is going to ride that damn bike - for the wasted space, they could have put a Batman motorcycle in its place.
3. Touching on point 2 - if they really wanted to put a bike in, why wouldn't they consult VW for their new storable bik.e...? Or at least steal the idea.