mines a 585l, about 61/2 years old, couldn't make up my mind on a 610 short or 610 long top tube so compromised with the 585l as it's a medium top tube, (the reason it's a 585l not 585m was explained in the pdf of the time, but i lost my copy, summit to do with them being stamped/made before a newer batch of 610 longs i think, and they didn't want to stamp the newer ones as xl, i forget the exact details it was years ago) )
i'm 6 foot if that's any help,
found it 2011 pdf
