I used to ride a 17" Orange Gringo, which had top tube of 566mm (effective 592mm) it was a great bike to ride, but I sold it as I needed the funds 
Would a 17" Kona have a similar top tube, I think it does vary from model to model & year to year
Full geometry of the Orange: 17"
A. Head Angle 71°
B. Seat Angle 73°
C. Top Tube 566
D. Effective TT 592
E. BB Height 306
F. Chainstay 420
G. Head Tube 100
H. Wheel base 1061

Would a 17" Kona have a similar top tube, I think it does vary from model to model & year to year
Full geometry of the Orange: 17"
A. Head Angle 71°
B. Seat Angle 73°
C. Top Tube 566
D. Effective TT 592
E. BB Height 306
F. Chainstay 420
G. Head Tube 100
H. Wheel base 1061