Just before I order the frame I have a question regarding frame sizing & if someone could offer feedback on my thinking before I make the purchase I would be most grateful.
I have been professionally measured up for both a tt bike & a road bike, on the road bike I was given a stack height of 59cm & a reach length of 36cm (with a 110mm stem) that will suit my body geometry.
The CAAD10 geometry is here:
http://www.cannondale.com/irl/2011/bike ... 10-ultegra
My thinking is that the 58cm frame will fit me. Reason being the stack height of 57.9cm will leave me with just one 5 or 10mm spacer below the stem & reach length of 39.9cm will require me to ride with an 80mm stem.
Am I right in thinking the above or should I size down, if I need to size down what would be the reason?
But anyway, let's calculate.
If you use a 110 stem (-6 degrees and 0 spacers I assume for this case) with a 360 reach 590 stack frame, you require a handlebar reach of 457 and stack of 645.
To achieve roughly the same position on a 58 cannondale that would translate into 15mm spacers, 80mm stem at -6 degrees.
On a 56: 35 mm spacers, 90mm stem at -6 degrees.
I'm worried that an 8cm stem is a bit short and will negatively affect the handling. If I understand, a shorter stem would make an already fast handing bike more twitchy.
I don't know what the difference in stack is between 58 and 56, but I would think that you could substitute that number of spacers and still be safe with the steerer tube.
What stem are you planning to use - a -6 degree type? You could always flip that and get a bit more than 2cm of lift that way. It doesn't look that bad.
daj wrote:You're probably not a pro, so don't compare yourself to them. By the way there are plenty of pro riders with considerable amount of spacers and even stems pointing upward.
Far from it - sure if I had the pro status I wouldn't need to be worrying about these things as the support team would just sort it all out & tell me to ride!
Cheers for taking the time to reply!
As for weight distribution on a frame - I haven't a clue! I am a 5' 09'' 64kg with a FTP of 245 Watts if that makes a difference on distribution!
Saddle height from centre of BB, parallel to the seat tube is 78cm & I ride 172.5mm cranks.
Think I sort of understand, yes the stack & reach of the 58cm would suit but between using a short stem (poorer road handling) & weight distribution (don't fully understand so still researching) at the stack height. So on that the 56cm might be a better fit, but would there be that much difference between 58cm vs 56cm?
@Jimilliron - what spacer depth / cockpit set up are you running?
But oversized frames will be heavier and people will look at you funny for riding such a large frame. I think the latter is the more important to most people, frankly.
RussellS wrote:I am 5'11" on 58cm CAAD7 and CAAD9. With 12cm stems and setback saddles. So at 5'9", you need a 56cm frame. Probably with a 11cm stem.
I'm really curious to see how you fit on that frame. I'm a half inch taller than you and I ride 56cm CAAD10 with a 12cm stem, 100mm drop, and saddle on a setback setup on the middle of the rails.
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