One advantage would be that it looks better on the show bike, another would be that it's marginally lighter and allows for a shorter wheelbase.
The disadvantage is it's less aero .. Slamming the wheel results in a stalled air stream between the wheel and frame which creates aerodynamic drag on the wheel. Although I'll give you it's not a consideration other then when using the bike for it's intended purpose ..
Look did a study and published, proving the optimum distance. Someone else can dig it up if they want ..
The disadvantage is it's less aero .. Slamming the wheel results in a stalled air stream between the wheel and frame which creates aerodynamic drag on the wheel. Although I'll give you it's not a consideration other then when using the bike for it's intended purpose ..
Look did a study and published, proving the optimum distance. Someone else can dig it up if they want ..