at 5'1", she is on the bubble in regards to Fit, and needing a 650 wheel or not. It is getting more and more difficult to find production bikes with a 650c option.
If she is comfortable with the setup of the Felt, get the handlebar X/Y numbers and compare to the brands you are looking at.
If she is not comfortable with her setup, or you really want to get good numbers, go get a professional fitting. I have fit a lot of "STW" (Super Tiny Women), and I"m 5'2". I do not consider myself an STW. I ride a 50cm Cervelo S3.
Liv Envie Reach is 369mm for a XS, and 365 for an XXS (700c wheel)
Cervelo S series Reach is 360 at a 48cm frame (700c wheel)
Felt does offer a 43cm frame, although not an aero frame
Thanks, yeah she says she is 'OK' on the Felt which to me means, she hasn't felt anything better (pun not intended) yet. She got her fit from the best possible option in NYC (Jonathan Blyer) but he gave more endurance options than race options and no aero road options. I don't think she needs 650c but given she is less confident about her skills than most, I figure the smaller wheels gives her more control, not sure if that's correct thinking.
Thanks for that, I don't know why I never looked at the S3, especially since she has a P3. Didn't think of Canyon either which she could wait for if it works.