In a flying 200 you want to use a gear that you can make one hell of an acceleration on towards the timing line. Most guys average 150-155 RPM over the 200m but more often or not hit a very high peak speed and taper off a bit. Alot of guys are starting to use MASSIVE gears witch works if you can squat what Chris Hoy does.

In all honesty I Would stay light in the gearing for a while. Develop a great set of fast legs and kick your ass into shape while your at it. Strenth work can be done on the bike by over gearing. Most guys start their over gear work 2-3" above their race gear.