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In desperate need for some advice! I'm looking at getting last year's model of the speedmax cf slx 8 rim brake, or the new cf8 disc di2. Looking at the geometry I'm worried I would be on the limit of the lower end of the small size frame on the cf slx. In regards the new cf 8 I'm worries it might be too relaxed. Would like your advice if one would fit better than the other or would either work as well?
Currently ride a giant trinity comp 2015.
My height 173cm.
Inseem 78cm
Saddle height 700mm
Centre of BB to back of arm pad 430mm
Centre of BB to base bar 550mm
Centre of BB to top of arm pad 610
Centre of my saddle behind BB is 105mm
Cranks 165mm.
These measurements are taken from my bike set-up currently. I'm not saying these are perfect for me by any means so need room to move either way once I have purchased new bike and gone for a fit.
Any help would be much appreciated.
Atchy,
I get why it's a challenge; you have long legs. 780mm inseam for a person 1730mm tall - that's leggy. The Pad Y of 610 seems good to me. the Pad X of 430 seems short - I would have guessed 450 but your number is not unreasonable.
If you were to get a rim brake SLX it would have to be a size Small (the Medium is too long). So the prescription for the size Small on the rim brake SLX would be... size Small, with 45mm of arm pad pedestal and you'll need the short stem that came stock on this bike but you'll also need a Canyon aftermarket item called a TSP (Team Switch Plate) without that your minimum Pad X is 453, with it the minimum is 426mm. Now, my feelings on this bike for your position: it's good but not fabulous. You're kinda painted in a corner as it can only go up in pads another 10mm and that's with another Canyon aftermarket item called a "High Stack Flat Spring". And, as stated you're already, at Pad X of 430 while the minimum is 426 - but that worries me less as I have a feeling your optimal position is longer and you'd probably get that with a saddle that allowed you to ride comfortably a bit forward of where you are now.
Regarding the new disc brake CF...you, like many folks can fit on two sizes:
If you got the XS you'd be good to go with stock stem of 70mm and you'd push the pads forward one hole shy of maximum and you'd have 20mm of spacer under the stem. You have 10 more mm to go forward as is if you like. If...something happed to your position where you wanted to go longer in the cockpit than 437mm of X then you'd just call Canyon and order an 80mm stem and you'd be golden.
If you got the Small you'd be dead center of the Pad X range with the 70mm stem that comes stock and you'd be slammed in terms of Pad Y (bike's minimum is 605, you're at 610). If something happened to your position where you wanted to go lower (typically, as time marches on, folks like to go up a hair rather than down but I don't know exactly where you are now) you could, possibly leave the Canyon stem species and get any over the counter, production stem that pointed down more and you could steal yourself a lower position. It won't look as clean: it's nice when the top of the Canyon stem is level with the bento - but looks are one thing and proper fit is another.
Get back to me here if you have questions.
Ian
Ian Murray
http://www.TriathlonTrainingSeries.com I like the pursuit of mastery
Twitter - @TriCoachIan