Quote Originally Posted by goldfinch View Post
I see that my well fitting Cannondale Quick has a seat tube angle of 76 degrees to go with the 50.5cm top tube. How does that compare with these other bikes?
Nominally, one degree of change in the STA results in 1cm change in the effective top tube. The exact number depends upon the seat tube length, so for smaller bikes, the ETT change will be slightly less.

Your 76 degree 50.5cm Quick is equivalent to:

75 degrees 51.5cm
74 degrees 52.5cm
73 degrees 53.5cm

Thus, the Myka is the same length as your Quick, and the others actually a bit shorter except for the Kula which is a lot shorter.