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pivotal seat post for old school bikes

#1 2009-10-24 4:39pm

Fox
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pivotal seat post for old school bikes

well i'd like to use a pivotal seat on one of my os rides, does any one know of a 22.2 pivotal seat post being made ?

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#2 2009-10-24 5:26pm

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Re: pivotal seat post for old school bikes

I just looked through all my suppliers, and no dice. Sorry.

Doug


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#3 2009-10-24 5:32pm

Giginfrogg
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Re: pivotal seat post for old school bikes

what the advantage of a pivotal post over a micro adjust, ive never owned either.


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#4 2009-10-24 5:34pm

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Re: pivotal seat post for old school bikes

Mostly weight.


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#5 2009-10-24 5:38pm

Fox
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Re: pivotal seat post for old school bikes

wagonguy wrote:

I just looked through all my suppliers, and no dice. Sorry.

Doug

thanks for looking it was worth a shot...

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#6 2009-10-24 5:58pm

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Re: pivotal seat post for old school bikes

Hmm I know away


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#7 2009-10-24 6:57pm

chemcopout
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Re: pivotal seat post for old school bikes

how, cuz i was wonderin the same thing?


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#8 2009-10-24 8:15pm

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Re: pivotal seat post for old school bikes

At interbike, MacNeil said they were moving to seattubes that use the OS sized seatpost. Seeing as they invented the pivitol system, I'd bet they'll be making 22.2 pivitol posts as well.
-Bill

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#9 2009-10-24 8:15pm

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Re: pivotal seat post for old school bikes

Well I was hooked up with one too 26.8. Needed 25. 4. Since I am home I have been using the file. This is not the best solution. But I got time


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#10 2009-10-24 8:34pm

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Re: pivotal seat post for old school bikes

get the cheapest pivotal post you can possibly find,
cut off the mount for it,
have it welded on a 22.2 size post.
done


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#11 2009-10-24 8:40pm

Fox
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Re: pivotal seat post for old school bikes

ANTDOG wrote:

Well I was hooked up with one too 26.8. Needed 25. 4. Since I am home I have been using the file. This is not the best solution. But I got time

yea i thought of that too, you think the post would still be strong enough after taking off 3.2mm ?

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#12 2009-10-25 7:45am

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Re: pivotal seat post for old school bikes

not sure I took off1.4 that might be too much


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#13 2009-10-25 7:59am

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Re: pivotal seat post for old school bikes

Playin with fire there.


I'm going to try this.  My project uses a drainpipe, but I want to use an MTB seat with exposed guts....:

http://i616.photobucket.com/albums/tt244/carlcagle/uglyseat.jpg

So, I'm trying this, but with a MTB post:

bring your 7/8 post to the store and trial fit the thing INSIDE the ID of the pivotal post.  Next, either find the same brand used, or broken, and cut about 1.75" from the bottom of the pivotal mount.

Go to your nearest HD or golf shop.  Get some HIGH STRESS epoxy.  Not the cheap crap, but something with 15000lbs of tensile shear strength or more.  It's gonna cost a few bux more than the regular.

Then, score the outside of the 7/8 post with a 60 grit or lower sandpaper, as well as the inside of the pivotal.  Mix up a batch of the epoxy.  Liberally goop the stuff on the outside of the 7/8 and inside the pivotal.  Don't worry about it spooging out just yet.

Push the pivotal over the 7/8 (hopefully you got one with a tight fit) and be sure that you mounted it in the correct orientation (like if your using a drainpipe, you don't want the pivotal HW pointing left).

Now, get our your mineral spirits (even though I forgot to tell you to buy some...like a buck for a years supply) and wipe the excess off the joint, so that it looks like a nice caulk joint.  An old T-shirt is great for this.  Just use plenty of the mineral spirits.

Then, let it sit over night, or better, for 48 hours.

How does it work?  Well, when was the last time you saw a driver head fly off a golf club?  Think about it...a driver head weights about 200 grams (about 1/3 pound) and it's being swung at somewhere between 80mph (for lamo's) and 170mph (for a decent pro) to a contact point with a ball that causes a severe impact...enough so that the shaft is actually deflecting almost 6 inches in bow and upwards of 10degrees of rotation at impact....over and over and over...for years.

So, I'm going to try this.  I'm just trying to find the appropriately sized post.  I'm 6'1" and 190, so it should be interesting to see how it turns out.

AJ


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#14 2009-10-26 1:50am

sourrox
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Re: pivotal seat post for old school bikes

I've been wanting something similar.  a pivitol lay back post.  but nobody makes one.

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#15 2009-10-26 2:03am

Gee Walls
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Re: pivotal seat post for old school bikes

mcseforsale wrote:

Playin with fire there.


I'm going to try this.  My project uses a drainpipe, but I want to use an MTB seat with exposed guts....:

http://i616.photobucket.com/albums/tt24 … lyseat.jpg

So, I'm trying this, but with a MTB post:

bring your 7/8 post to the store and trial fit the thing INSIDE the ID of the pivotal post.  Next, either find the same brand used, or broken, and cut about 1.75" from the bottom of the pivotal mount.

Go to your nearest HD or golf shop.  Get some HIGH STRESS epoxy.  Not the cheap crap, but something with 15000lbs of tensile shear strength or more.  It's gonna cost a few bux more than the regular.

Then, score the outside of the 7/8 post with a 60 grit or lower sandpaper, as well as the inside of the pivotal.  Mix up a batch of the epoxy.  Liberally goop the stuff on the outside of the 7/8 and inside the pivotal.  Don't worry about it spooging out just yet.

Push the pivotal over the 7/8 (hopefully you got one with a tight fit) and be sure that you mounted it in the correct orientation (like if your using a drainpipe, you don't want the pivotal HW pointing left).

Now, get our your mineral spirits (even though I forgot to tell you to buy some...like a buck for a years supply) and wipe the excess off the joint, so that it looks like a nice caulk joint.  An old T-shirt is great for this.  Just use plenty of the mineral spirits.

Then, let it sit over night, or better, for 48 hours.

How does it work?  Well, when was the last time you saw a driver head fly off a golf club?  Think about it...a driver head weights about 200 grams (about 1/3 pound) and it's being swung at somewhere between 80mph (for lamo's) and 170mph (for a decent pro) to a contact point with a ball that causes a severe impact...enough so that the shaft is actually deflecting almost 6 inches in bow and upwards of 10degrees of rotation at impact....over and over and over...for years.

So, I'm going to try this.  I'm just trying to find the appropriately sized post.  I'm 6'1" and 190, so it should be interesting to see how it turns out.

AJ

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#16 2011-01-19 8:08pm

malibu jim
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Re: pivotal seat post for old school bikes

dans comp has the new pivotal post for old school size tube 7/8" or 22.2


[img]http://i664.photobucket.com/albums/vv10/malibu-jim/bikes/bikeatlighthouse018-1.jpg[/img]

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#17 2011-01-19 8:24pm

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Re: pivotal seat post for old school bikes

malibu jim wrote:

dans comp has the new pivotal post for old school size tube 7/8" or 22.2

Link or brand, please. smile


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#18 2011-01-19 8:31pm

malibu jim
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Re: pivotal seat post for old school bikes

http://www.danscomp.com/products.php?at … =seatposts
Macneil Stump Pivotsl seat post part #472077


[img]http://i664.photobucket.com/albums/vv10/malibu-jim/bikes/bikeatlighthouse018-1.jpg[/img]

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#19 2011-01-19 8:52pm

Neil-Son
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Re: pivotal seat post for old school bikes

http://www.danscomp.com/472077.php


too bad they dont make em longer

Last edited by SuperSon (2011-01-19 8:54pm)

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#20 2011-03-09 7:44pm

GhostRiderGT
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Re: pivotal seat post for old school bikes

I found a 22.2 mm pivotal seat post onhttp://www.tenpackbmx.com/products/seats_posts_clamps/index.html

They come in red and black in either 22.2 or 25.4

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#21 2016-05-09 2:04pm

cmc
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Re: pivotal seat post for old school bikes

yeah, just Googled it, and there are apparently quite a few 22.2 pivotal posts.

http://www.supercrossbmx.com/products/s … votal-post


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#22 2021-09-06 6:09am

Bootsauce
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Re: pivotal seat post for old school bikes

sourrox wrote:

I've been wanting something similar.  a pivitol lay back post.  but nobody makes one.

Actually Cult does now. They're just regularly out of stock everywhere right at this moment.

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