I have been offered a friend's Colnago CX-1 Evo frame, and before saying yes (and parting with my cash) am trying to work out how it compares to my current set-up. Am finding Colnago sizing quite confusing.
The potential new frame is a 54S (see chart below for the geometry).http://www.sigmasport.co.uk/Product/196 ... t-2011.asp
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Am currently riding a Condor, top tube length is around 55cm, headtube is 168mm. I'm running a fairly short (100mm) stem. I'm 5'11. Although I have been riding with this set-up for several years, I have noted that my lower back tends to arch a little when riding on the tops. Also I sometimes find it comfortable after a few hours in the saddle to rest my hands fully on top of the bars (i.e. not gripping the bar, rather 'steering' with the hands entirely on top - obviously I don't do this when I'm not straight-lining on a flat empty road!). My riding is almost entirely sportive-based (including the Etape etc).
Which makes me wonder if the extra head tube height on the Colnago, and the slightly longer (55 vs 56 cm) top tube would actually work nicely.
I should also point out that I am planning on doing a bike fitting at some point later this year, but (given that the frame is currently in Spain) I can't just carry it into a fitting and say 'will this work for me'. So unfortunately I need to try and 'work it out for myself'. Plan would then be to build the bike up with my current components, take it in for a fitting, and the adjust stem etc. accordingly depending on the outcome of the fitting.
Thanks for your help all.