there was a thread about chainrings a few days ago but i couldn't find it again. started training long with my P2K last Saturday on a course that i'm presuming to be similar to IMOZ (i'm entered for next year). currently have 53/39 rings set-up with a 23-11 casette. i was going for a 30kph (19-20mph) pace throughout which i could do with the 53x21 on the flats and through short 50-100m hills. but on longer hills i had to go down to the 39 and it was annoying trying to find the right gear on back--they seemed too light, forcing me to spin and thus making me uncomfortable in my tuck. so, i've pretty much figured out that i should probably switch the 39 for a 42. my question is is there any benefit to switching the 53 for something smaller? maybe a 52 or even a 50?

Kim