Originally Posted by
freesafety22
so looks like i need to order a...
12 x 25 Ultegra 6600 chainring
does that sound about right?
unless i change out the cassette for more low end or top end power?
The 12x25 is a cassette, not a chainring.
Get a larger large cog (say a 12x27 cassette) if you want more climbing help. A smaller small cog (11T instead of 12T) won't give you more power but it will offer more speed IF you are strong enough to turn it. Very few riders are.