If the 52 X 16 is too "tall", get a larger rear sprocket. Try an 18T or some such. It helps to know the gear ratio you want, need or like. It is easy to figure out which rear sprocket will give you that ratio.
For example, I you know you like a 45 X 17, then get a 20T cog for use with your 52T chainring.
(45T/17T) = 2.65 52T/2.65 = 19.6T --> 20T (rounding off, in this case rounding up)
I am suggesting this approach assuming it is less expensive to replace the rear cog that it is to replace the bottom bracket, spindle and crankset and then need to find something other than a 52T chainring for the new crank. I could be wrong on this point.
Last edited by Mike Mills; 11-09-08 at 12:43 PM.