Hi,

I am new to the track bike scene and I had a few questions. I am looking into building a bike, and I am looking around for a frame.

1. I hear a lot of people talking about frame geometry, such as "lax" or "tight" geometry. Generally, what does this entail? What sort of angle of the tubes makes a frame tight or relaxed, and what effect does this have on handling?

2. Materials - I have realized most frames are Cromoly, which is a sort of steel, I have gathered. However, I know they make aluminum frames too, which I am assuming are not as strong/stiff. Is every "steel" frame a cromoly frame? Becuase I have a feeling the steel of my crappy Free Spirit is a bit heavier than the Cromoly frames ive seen in shops.

3. Brake placement - Until I get used to riding a fixed gear, I'm going to have at least one brake. Is it better to place it on the front or rear wheel, in case of emergency?

Also, I have yet to get a frame. I was thinking about going around to yard sales and looking for an old road bike to strip down and restore/rebuild as a track setup. Anything I should watch out for, besides rust? This is my first project bike, so I am not concerned too much about this - ill probably just pick whatever looks the best - but still, any suggestions.

thanks!