road bike frame size my wife bought me a used flat bar road bike for christmas. to her a bike is a bike, one size fits all. it was quite ovious to me that it was going to be way to large as it had a sticker on the frame with XL on it, and im 5'5"/ 5'6".

not wanting to sound ungrateful i gave it a try. lowered the seat nearly write down to get the correct reach ( leg straight with heel on the peddle at 6 o'clock.
the stand over brings the cross bar tight into my  crotch, but thats not a problem.

the ct of this bike is 56.5cm
the advised ct for me is 51cm. 50cm/52cm could also work.

so my questons are, can i say this bike fits me.
or am i riding at a disadvantage with this lare frame.
If the saddle position in picture is good for you, the frame is definitely too large. It's not the top tube you should worry about, but the handlebars are too high and forward which makes the position uncomfortable.

For comparison, I'm 6" and usually the frame size that fits is M.