I am 5'9" with longer legs than torso so explains a 56 to manage the drop.
Quick specs for comparison.
HTA 73.5 TT 564 HTLength 173 Stack 580 Reach 387
HTA 73 TT 545 HTLength 140 Stack 544 Reach 384
I currently have about 140mm of seat post from cradle to seat tube. Actual BB to seat top along seat tube is 745.
Can anyone give me a ballpark of how drop I will end up with changing between the frames? I am concerned if I went 56 again the added reach is just too much.
So the 56 Evo would use the same stem that you have currently but require 20mm more spacing underneath for the same drop.
If by 20mm spacers on the Cervelo you are including the headset top cap then that wouldn't be a problem. If you have 20mm of spacers on top of a 15mm cap (which is just a spacer) then another 20mm would be past the limits for the fork steerer.
Which bars are you using? you may be able to choose a shorter reach model that would allow the stem to be lengthened and thus gain some height that way.
The Evo sizing isn't very good - the steps between sizes are very uneven and you're in one of the wide gaps.
cyclenutnz wrote:It's not entirely the difference. For every 10mm of spacers the reach reduces by ~3mm.
Right, so to achieve approximately the same bar drop and reach as his current bike he'd need to ad 30+mm of spacers and get a 10mm longer stem.
RussellS wrote:I have two Cannondale CAAD aluminum frames so I consider myself to know something about how Cannondale bikes fit. The CAAD aluminum and the SuperSix EVO you mention appear to have the same geometry.
The Evo has a slightly shorter front center.
To clarify a little. I previously was on a 54 S1 and had a drop that was just too much at the time. This is what prompted the 56 in the R3.
Looking at the S1 specs they are a bit closer to the 54 Evo. Given that, I should go 56 so I can continue to remove spacers and go negative on stem instead of trying to compensate for to short of a head tube. Ultimately I will discuss this with my fitter at the LBS. I know they probably have botha 54 and 56 C'dale with these geos in stock so we can compare.
2016 Cannondale EVO Etap 13.8#'s
2012 Cannondale Supersix EVO etap 13.7#'s
2017 Cannondale SUPER X Force 16.0#'s
2016 Cannondale FatCad2 28.1#'s
2011 Cannondale Carbon Flash 1 17.9#'s
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