Quote Originally Posted by makbike View Post
Does the change in geometry cause me to use muscles differently?
Glad you have been able to get out on the bike a bit, Mak

I had exactly the sensation when I went from my Scorpio (a frame size to big) to my Giant... sore lower abs and to a lesser extent lower back. After a couple of weeks - no problem.

I had not problems when I got my second bike - my EMC2, but as I changed my Giant into an increasingly more aero one, I have the sore abs after some changes.

In fact, I have them today. Yesterday my partner took out a one centimetre / half inch spacer from my handle bars, and of course we dipped the nose of the seat more. I only rode about 4 kms on it to test it (I had already been for a ride on my EMC2) but today I can feel it in my abs, neck and lower back. I have a team time trial today - after 33km I am guessing I will be feeling the position. However, I anticipate in a couple of weeks my body will have adjusted itself into the new position.

(LOL - then in February I'll be doing it again I hope and taking out the final spacer!)

So, now you have had the looooong answer - I'll give you the short one to your question...

"Yup, you're on a new bike and that would be the first thing I would guess at..."