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Frame fitting Pinarello Opera(12 posts)

Frame fitting Pinarello Operavram
May 8, 2001 9:52 AM
I just read the Colnago thread and realized that I better check out fit issues before I make my irreverible decision. I am in the process of buying a Pinarello Opera and wanted to be assured by the experts on this forum I was going down the right path...

Currently, I am riding a cannondale -top tube 56 cms, ct-56 cms, standover 81 cms, seat tube angle 73.5 degrees, head tube angle 73 degrees, stem 11 cms. My inseam is 32 inches (I believe it is 81.3 cms). The standover clearance is a bit on the tighter size. The top tube is slightly on the longer side (I feel a bit too stretched out)although it may also have something to do with my flexibility.

I have ordered a Pinarello Opera thru my LBS, it hasn't arrived yet although I could ask for a different size if really necessary. I have ordered for a 55cms Pinarello measured center to center. The top tube is 55cms, seat-tube angle is 73 degrees. The Opera measured 56 cms c-c has a top-tube length of 56 cms and a 73 dgrees seat-tube angle.

Have I made the right decision to go for the 55cms? Since it is measured c-c will the standover height be more like c-t 56cms? If you need more info about arm length, femur etc.. let me know, I have it readily available.

Thanks folks!

Pinarello website has all kinds of numbers on tube thickness (I think) which I haven't been able to figure out. Any one have any clues?
re: Frame fitting Pinarello OperaJBob
May 8, 2001 10:46 AM
Isn't that something you/your LBS shoulda thought about BEFORE ordering the frameset? BTW, there are no experts on this forum.
Ideally, howevervram
May 8, 2001 1:36 PM
My LBS nor any shop in my area stock Pinarello bikes. So I have to depend on manufacturer's measurements. From my current bike I know what measurements would suit me best--what I would like is a confirmation of my choice of frame size and/or insights on something I've overlooked.

Do you have any suggestions to give?
re: Frame fitting Pinarello OperaET
May 8, 2001 2:07 PM
If your standover clearance is tight on a 56 c-t, then 56 c-c is definitely too big. And the slightly gentler seat tube angle (given there as higher than 73 but lower than 73.5) will lengthen your top tube slightly. So it looks like you did good by not getting the 56. That said, I wonder if the 54 would've been better. You didn't say what your clearance was over the Cannondale. If it's not way too close, it sounds pretty good. Don't have time to do the calcs now, but your standover clearance on the 55 c-c will probably be slightly tighter than on the 56 c-t Cannondale.
May 8, 2001 2:37 PM
Thanks for your comments. The clearance over the cannondale is on the tighter side--standover height of a 56 cms frame is 81.0 cms. My inseam is 81.3 cms. A 54cms Pinarello has a 54.7cms top-tube and 73 degrees seat-tube angle.

It is basically a close decision between a 54cms and 55cms Pinarello. I could definitely fit on a 54cms but may need a 12cms stem.
expert? advice....dave
May 8, 2001 5:16 PM
Hopefully I qualify with 17 years of riding experience and a mechanical engineering degree.

A quick check of the Pinarello website shows the seat tube angles to be virtually identical. The 55cm Pinarello has a 55cm top tube which is 1cm shorter than the c'dale. You say you feel stretched on the C'dale, but don't give your stem length. The shorter top tube may be just what you want. You can expect to need a 1cm longer stem, to get the same reach as your C'dale.

The standover height on the on the 55cm Pinarello should around .3cm shorter (negligible difference). It's bottom bracket is .8cm lower, but the top of the top tube will be about 56.5cm, which is .5cm taller.

If you really have minimal standover clearance, the obvious choice would have been a 54cm. The seat tube angles are the same, and the top tube is only .3cm shorter.

Check your standover clearance by placing an equal amount of boards or magazines under each wheel, gradually increasing the amount until you get firm (saddle like) pressure in the crotch when standing over the bike in bare feet with cycling shorts on. The minimum clearance I would use is 2cm or 3/4", 3cm is my preferance, more than 4cm is unnecessary. I also carefully check the head tube length of any potential new frame, to avoid the need for more than 1cm of steering tube spacers. Short head tubes are not great with threadless stems.
expert? advice....vram
May 8, 2001 11:15 PM
By "expert" I meant expertise of various kinds that members on this forum bring to discusions about bikes. I hope I didn't discourage folks from airing their opinions that I would like to hear, just because they don't have a formal degree and stuff.

Thanks for your valuable input. The current stem I use on my cannondale is 11cms. My inseam is 81.3cms and my cannondale's standover clearance is 81.0. By your estimates, that's an extremely "tight" fit (not that I am boasting about my "package" or anything :) I don't have the standover numbers for the Pinarellos. I assume they will be pretty close to cannondale's respective frame sizes.

So it looks like 54cms would be the optimal choice, although I may have to go with a longer stem, maybe a 12cms, which is within reasonable bounds. The top-tube on the 55cms may fit me with a 11cms (current) stem, although standover clearance may not be more than 1.3 cms, which isn't optimal.
Pinarello are measured...Ron L.
May 9, 2001 12:12 AM
center to top, not center to center as shown in the books. That c/c is a typo it should read c/t.
e-mail me if you need more info.
Are you absolutely sure? That would be a first.ET
May 9, 2001 6:29 AM
That a company's own catalog/web site would explicitly say c-c when it's really something else. The diagram there also shows c-c. Yes, catalog diagrams often show the type of c-t incorrectly (e.g. making it appear as if it's to top of top tube when in reality it's to top of seat tube), but this is different. All the on-line sales companies also show c-c.
I am vary sure...Ron L.
May 9, 2001 3:17 PM
they are all wrong. I sell Pinarello's and currently riding the Paris, Opera, and the Prince. I had my first five frames pulled from the box and measured by hand. The only thing I can say is find one and measure it. With all due respect to your LBS; this is something they should know.
I am vary sure...vram
May 9, 2001 10:16 PM
My LBS just got a Prince and Surprise frameset. Will go and measure it to make sure.

So effectively what is the consequence of this on my decision? Does this mean that the 55cms Pinarello is smaller than a 56cms C-T cannondale, and will consequently have greater standover clearance?
Check it yourself...Ron L.
May 10, 2001 12:32 AM
and let me know what you find.
Lets assume that your C'dale has the same bb height as the Pinarello framset. Then the answer to your question is yes, the 55cm c/t Pinarello is smaller than the C'dale being a 56cm c/t. Because you are talking about standover height and not frame size.