Ballistic 550's a reality

[hlb14]

so which would be better suited for an rc8 on a tight indoor track limited to 2s lipo? i did the math on a 5.5 being 3700kv geared 17/46 to equal roughly 28 mph and ordered a 5.5... then i read the tuning rotor that comes with the ballistics reduces the kv by 20%. Would the 4.5 work better? O, i will be using a mmp if that helps, thanks