I am eyeing up my next bike and I am really interested in buying the cervelo R3.  I have visited a couple of bike shops and not got much sense in terms of whether the bike will fit - I am 6'6" tall.  Can anyone advise whether the size 61 frame will fit me? Would I be better off going for the RS with its longer head tube?

I currently ride a 63cm Cannondale.

I would go to a cervelo dealer and have them set up there fitting cycle to the geometry of the 61, and see if you can get an exceptable fit from it.

sam