figuring out fit

[Torrilin]

It's not just my core. As my core gets stronger the bike hurts more, not less. And my core is getting stronger. I did 6 miles today and was using my core muscles to get good positioning most of the trip. Before now, maintaining core support on a 2 mile ride was hard.

If it were just my core muscles, I'd expect the bike to get more comfortable as I get stronger.

[KnottedYet]

See if you can get ahold of a copy of "Andy Pruitt's Complete Medical Guide for Cyclists" by Andy Pruitt.

It is a wonderful book that goes step-by-step through the fit process (making the bike fit YOU, not some ideal imaginary rider) and also goes step-by-step through pains and what can be adjusted to address them.

Several TE'ers have used this book and liked it.

(and off the bat I'd say you need to get a new saddle, raise your bars, and maybe switch to albatrosses.)