Originally Posted by
Doc V
I am 5ft 6in (167.6cm) and ride a 52cm effective top tube frame. The Competitive Cyclist website calcs say I should ride a 53-54cm effective top tube, but I am disproportionately long in the legs (81.8cm inseam) a frame one size smaller fits me well. I then installed a 110mm stem to accommodate my arms.
I'm jealous! I'm 5' 5' (165 cm) and have an inseam of 72.5 cm...
To answer the OP's question, I ride a size 51 frame with an effective top tube length of 52.4 cm. I had the stem swapped with a shorter one (-10 mm) as I felt somewhat stretched with the original stem.