Originally Posted by
fietsbob
try to keep up with faster riders, that will take work , not parts*..
Middle age, then its back down hill with the years.. ..
just ride fixies? Join a track racing club.. Match Sprint or Pursuit?
* may want a bunch more gear sizes in your infield track gear bag , what cog : chainring tooth count you run now?

I am currently using an FSA Carbon Track crank set with a 49 tooth chaining and a 16 tooth cog. But my body type isn't really that good for track sprinting, I am a small guy @ 5'8 and 130lbs and I naturally do better in the climbs than on the flats or downhills.