My wife, who is 5'1", bought a custom built bike this summer.
Color: Blue
700 X 37
Top Tube: 51cm
Seat Tube: 48 cm
Chainstays: 43.5 cm
Front fork axle to middle of bottom bracket: 74 cm
Seat tube angle: 75 degrees
Head tube angle: 69.7 degrees
http://www.crazyguyonabike.com/journ..._id=23579&v=6g
http://www.crazyguyonabike.com/journ..._id=27153&v=2g