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  1. #26
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    Quote Originally Posted by roadworthy View Post
    In bold...it isn't. Many are deceived by the new COBL post...because optically it looks like it has a lot more setback than it has. This is because of the forward offset which creates the pivoting/suspension effect and creates the illusion of more setback.

    This can be and is proved pictorially. A tenant of scale is...for an orthogonal (perpendicular in 2 views) view of any picture, a single dimension can be used as scale for other features. This is not unlike using a scale on a map for example.
    See below. I have constructed such a picture. All you have to do is compare the setback to the seat post diameter which is known to be 27.2mm. Amount of setback is not as wide as the width of the post. It is a bit less. This comports with the advertised setback of the COBL post which is stated to be 25mm which is accurate. The center of the saddle clamp shares the centerline with the single bolt that the post tilts around.

    A further word. The guys that develop this stuff are smart. They understand industry norms and the demographics of their customers. They aren't going to put a high end seat post out there that doesn't have appeal to this broad demographic. In the industry, the most popular setback for a setback post is 25mm. Many pros in the peloton ride this amount of setback. I do too for example. My seatpost of choice is the FSA K-force light 2 bolt with 25mm setback.
    Well all that's very interesting, but like many here, I can't get the stock S-Works saddle anywhere near far enough forward to match my fit specs (saddle nose 6cm behind BB center) and I'm not some genetic freak. My LBS says this is far from uncommon in their experience (they are a LARGE Spesh dealer in the Denver area). It is an amazing post, but I just can't make it fit. I bought an ENVE post to replace it (also 25mm set back) and it works perfectly. I'd say the very smart developers at Specialized screwed the pooch on this one. Also their use of ovalized clamps on the post to be compatible with the Spesh carbon rail saddles severely limits your choice of saddles. So, unless Spesh saddles or a very limited number of others work for you, you're out of luck wr2 using the CGR.

    Seriously bums me out since on my limited number of rides on the CGR post, it is freaking amazing in terms of smoothing out the road. Road seams that I normally have to get out of the saddle for, I just cruised over barely noticing them.

    I wonder, has anyone tried reversing the post?

    On further reflection, I believe the issue with your analysis may be you're measuring along the axis of the seatpost rather than against a vertical plane which is what is relevant to saddle positioning vs the BB.
    Well, you know, that's just, like, your opinion man. - The Dude

  2. #27
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    Quote Originally Posted by Neb View Post
    13.6 Nm (pdf)? That's rather impressive, I thought that the 12Nm spec for the Enve seatposts was quite a lot already.
    ENVE spec is actually 8-12 NM. I use 10 and it seems to be holding fine (and I'm no 145 lb climbing specialist).
    Well, you know, that's just, like, your opinion man. - The Dude

  3. #28
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    Quote Originally Posted by OldChipper View Post
    Well all that's very interesting, but like many here, I can't get the stock S-Works saddle anywhere near far enough forward to match my fit specs (saddle nose 6cm behind BB center) and I'm not some genetic freak. My LBS says this is far from uncommon in their experience (they are a LARGE Spesh dealer in the Denver area). It is an amazing post, but I just can't make it fit. I bought an ENVE post to replace it (also 25mm set back) and it works perfectly. I'd say the very smart developers at Specialized screwed the pooch on this one. Also their use of ovalized clamps on the post to be compatible with the Spesh carbon rail saddles severely limits your choice of saddles. So, unless Spesh saddles or a very limited number of others work for you, you're out of luck wr2 using the CGR.

    Seriously bums me out since on my limited number of rides on the CGR post, it is freaking amazing in terms of smoothing out the road. Road seams that I normally have to get out of the saddle for, I just cruised over barely noticing them.

    I wonder, has anyone tried reversing the post?

    On further reflection, I believe the issue with your analysis may be you're measuring along the axis of the seatpost rather than against a vertical plane which is what is relevant to saddle positioning vs the BB.
    My analysis is sound. The COBL post has 25mm setback. If you have any doubts contact Specialized Joe and ask him...he has direct contact with Specialized engineering department.
    So basically you have substituted one 25mm seat post for another and miraculously got it work.

    The other elephant in the room is how you arrived at 6cm as your magical best setback. Some pros ride with 110mm setback. I ride with 100mm setback.
    No the COBL post is not all things. It is not a 0 offset post...nor does it have 16mm like the popular dogleg Thomson post. And no its offset won't work well for all riders. Statistically however a 25mm setback post...what the COBL post is...works for many pros and amateurs including me....though I personally don't endorse the concept or ride the COBL post. I prefer a solid post.

    In summary, Specialized didn't screw the pooch. On the contrary. A better statement is...many screw the pooch by their interpretation of design intent as well as screw the pooch in terms of what setback they believe is correct for weight distribution and kinematics for maximum power generation. Blind adherence to KOPS is dismissed by most leading fitters.
    Last edited by roadworthy; 06-01-2014 at 12:25 PM.

  4. #29
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    Quote Originally Posted by OldChipper View Post
    Well all

    On further reflection, I believe the issue with your analysis may be you're measuring along the axis of the seatpost rather than against a vertical plane which is what is relevant to saddle positioning vs the BB.
    It seems to be a very honest 25mm setback.

    Not sure how others measure but they might know the market better....

    I don't see a lot of racers using it

    Saw this the other day. Very nice looking

    CGR seatpost...why oh why did I wait so long?-onecol.jpg

  5. #30
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    I'll have to get down to my LBS to see if he has one on a new bike that I can look at. Some of the roads in my area are pretty rough so it would really make riding a bit more comfortable.

  6. #31
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    CGR seatpost...why oh why did I wait so long?

    I love my CG-r on my aluminum frame bike

    I had my LBS confirm my fit

    2010 Specialized Secteur Elite with the RBR not-approved Mavic Ksyrium Elite wheelset
    2009 Specialized Rockhopper Comp 29er upgraded to SRAM X9 with 1x10 and Stan's Arch EX rims and tubeless.
    2013 Cannondale CAADX-6 Tiagra with 9-speed SLX RD to run 11-32T cassette and Stan's Alpha 400 rims and tubeless
    and
    Some Burton snowboard setups, one with stiff ol' Camber and one with Rocker-Camber-Rocker

  7. #32
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    Like all Specialized carbon components this post has a 240 lb weight limit. Leaves me out plus even if I was close I wouldn't want to use it.
    2015 Specialized Tarmac, Ultegra 6800, HED C2 rims
    2014 Specialized Roubaix Expert, Ultegra 6800, HED C 2 rims.
    2012 Giant Defy Advanced 2, Ultegra, Pacenti SL 23 rims.
    Moots VaMoots, Dura-Ace, Pacenti SL 23 rims

  8. #33
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    Quote Originally Posted by roadworthy View Post
    My analysis is sound. The COBL post has 25mm setback. If you have any doubts contact Specialized Joe and ask him...he has direct contact with Specialized engineering department.
    So basically you have substituted one 25mm seat post for another and miraculously got it work.

    The other elephant in the room is how you arrived at 6cm as your magical best setback. Some pros ride with 110mm setback. I ride with 100mm setback.
    No the COBL post is not all things. It is not a 0 offset post...nor does it have 16mm like the popular dogleg Thomson post. And no its offset won't work well for all riders. Statistically however a 25mm setback post...what the COBL post is...works for many pros and amateurs including me....though I personally don't endorse the concept or ride the COBL post. I prefer a solid post.

    In summary, Specialized didn't screw the pooch. On the contrary. A better statement is...many screw the pooch by their interpretation of design intent as well as screw the pooch in terms of what setback they believe is correct for weight distribution and kinematics for maximum power generation. Blind adherence to KOPS is dismissed by most leading fitters.
    Hmmm... let's apply Occam's Razor. Which is more likely, that: A) I and many others who would very much like to get the CGR seatpost to work for them and have gotten many other 25 mm setback posts to work for their position (and who are now stuck with a useless $200+ CGR seatpost BTW) are lying or hallucinating -OR- B) every other seatpost manufacturer has conspired to convince the market that their 23mm setpack posts are really 25mm -OR- C) that Specialized, who have a significant financial stake in selling CGR seatposts and, therefore, getting people believe that the setback on it is 25mm, f*cked up in design or production and are lying to cover their butts?

    I got a different 25mm setback post to "magically" work for me? HAHAHAHAHAHAHA! If that's the case, why wouldn't I wave the same magic wand and get the CGR to work for me? I ***really*** like it; I just can't make it work.

    I "arrived" at 6cm setback by visiting 2 different, highly regarded bike fitters in the Denver metro area (an area lousy with pros and high-end amateurs) - NOT by simply measuring knee-over-pedal-spindle - and by logging well over 10,000 miles with this position. Seems to be working. ;) You may not be aware that the average pro has a longer femur than the average bike-riding population so not surprising that they would ride with a greater set-back.
    Well, you know, that's just, like, your opinion man. - The Dude

  9. #34
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    The CG-R seatpost has the exact same setback as the Pave seatpost.

  10. #35
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    I have six road bikes all set up the same. All the seat posts have setback but I never bothered to measure them.One of them is a Roubaix with the CG-R. Pretty much middle of saddle rails like all the rest of my bikes. Plenty of room to go forward or back.

  11. #36
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    There are many posts complaining about the setback of the CG-R seat post. I don't know why this is even being debated at this point.

  12. #37
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    I do not get it with running your saddles so far forward? are you all doing Tri's or Ironman?
    I run my saddles forward with my knee over the pedal! (the old standard form years ago) but after a BODY GEOMETRY FIT and how I can climb hills faster in a higher gear and go faster all round.
    My saddle is how 20mm plus back from this point and at last i'm having fun riding
    On a lot of my bikes the saddle is as far back as I can get it.

    I would say get a BODY GEOMETRY FIT and see how much more fun you all can have with a good fit

    I plan to fit a CG-R seatpost on my Awol

    Kiwi Pete.....
    Service Manager at a Specialized Bike Shop in NZ

  13. #38
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    Quote Originally Posted by Crispyraisin View Post
    The CG-R seatpost has the exact same setback as the Pave seatpost.
    ....which = 25mm and sold on many high end Specialized bikes.

  14. #39
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    Quote Originally Posted by roadworthy View Post
    ....which = 25mm and sold on many high end Specialized bikes.
    And we all know that whether you are 5' or 6'6" 25mm of setback on your seat post is guaranteed to work for every rider...

    Quote Originally Posted by NZPeterG View Post
    My saddle is how 20mm plus back from this point and at last i'm having fun riding :
    You should totally #slamthatstem while you're at it.

  15. #40
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    Quote Originally Posted by OldChipper View Post
    ...I wonder, has anyone tried reversing the post?...
    Bump...I just bought a 2018 S-Works Roubiaix (sweet) and I have very short legs. I've never been able to use anything but a zero setback seatpost (or something close) on any bike I've ever owned. Using the age-old method of dropping a plumb bob from the bony protrusion just below my knee cap (with my pedal at 3 o'clock), even with a 10mm setback seatpost (which is what I had on hand) I'll need a -10mm-ish setback seatpost (which doesn't exist AFAIK) in order to get my saddle far-enough forward on the Roubaix. Of course using a seatpost that will tilt enough when turned around backwards will work). Better still since I already have the CG-R (aka cobble gobbler) why not use it reversed/backwards? I know that its suspension performance won't be as good in this position but I'm more concerned with some odd or even dangerous side-effects.
    Last edited by bike-ra; 1 Week Ago at 02:43 PM.

  16. #41
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    I reversed my CG-R cobble gobbler post for a short test ride and it seemed to work nearly as well as if it were in the "correct" orientation. The only problem is forget about using a saddle bag (the turkey neck protrudes to the rear of the saddle such that only the teensiest saddle might fit in there).

    This is a deal breaker for me so I've shelled out yet more bucks for my new bike to get a Specialized S-Works Carbon 20mm setback post, which I'll reverse but which won't prevent me from using a decent-sized seatbag. BTW - there aren't many seat posts out there that will allow the seat rail mechanism to rotate sufficiently to reverse it (i.e., 360deg for the Spesh)...there's the Bonty XXX and an even pricier Zipp SL Speed but not much else.

    Personally I don't think the loss of the CG-R is that noticeable for the Roubaix (which uses other design features to add compliance to the rear of the bike). Is it better with it - yes. But, knowing that setback seatposts don't work with my short legs, prior to buying the Roubaix I demo'd it back-to-back with the CG-R and then a 0mm setback post (in alloy no less). I found the loss in rear compliance to be minimal IMHO other than on big hits. And when I see big hits coming I normally lift my butt off the saddle well in advance (which is good practice with or without the CG-R).

    So reversing the C-GR seatpost for those with short legs still looks like a good solution (unless there's some long term durability/failure issues with using it in this manner), and as long as you can do without a saddle bag. Two big BUT's?
    Last edited by bike-ra; 1 Week Ago at 07:41 AM.

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