Originally Posted by queerpunk

I change my rings once or twice a night.

My answer depends on a lot of factors, though. My category, my track's race schedule, the weather, and so forth. But I raced up to a cat 2 doing only occasional gear changes, and racing nearly everything (endurance and sprint races) in a 90.

I usually warm up on a 16, and then change to a 15 for racing. 90 or 92 for most endurance events. Bit more for very short (that is, very fast) warm-up races if I'm gunning for a result.

One of the very fast guys at my track said he got tired of changing chanrings and just switches cogs. 15, 14, or 13. But he can turn over a very large gear.

I don't really fuss with centering a ring.

Good tip for making it all easier is to use a bit of tubular glue to glue in the backside bolts to your cranks.