Hi everyone. I'll be new to track racing, and have a road bike conversion that will become my trainer. Currently it has a 78" Gear inch/ almost a 6 gain ratio. Is this a good training gear? I've never raced, or being at a velodrome for that matter, so I'm thinking it is a good compromise for beginner's strength and spinning. Am I correct? thanks in Advance. Also, why there aren't any track bikes with a 52t or larger chainring?