22.2mm seatpost to small to fit old school frames.....22.6mm???  RSS Feed

#1 2010-02-08 1:38am

stonie
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22.2mm seatpost to small to fit old school frames.....22.6mm???

I have a couple 1988 GT Pro Series, a mid 80's Redline PL-24 cruiser,
and a 1982 Redline MX-2 that all use a bigger size than 22.2mm seat post.
Might even have a few other frames that use a bigger than 22.2mm
size too but not quite sure until I check.

I insert a 22.2mm standard size post and it's too small. 25.4 way too big.

I scored a 22.6mm lay back post a while ago and fits my
Pl-24 perfectly. Haven't checked it in the other frames yet,
but I am certain that the 22.6mm would fit well in those frames too.

So what size post is correct for these old/mid school frames?

Kinda funny since I never see 22.6mm posts up for sale.

I hate the squish factor on the seat tube, and without some
sort of shim the 22.2mm posts just aren't cutting it, and are too small.

Any feedback on this would be awesome. Sorry if I posted
this in the wrong section.

Jeff


Gnarly is when it's beyond radical, it's balls out danger, & or perfection, & or skill or all of that combined. Nobody can shred like that guy, he's gnarly.                                        \m/  ( º . º )  \m/
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#2 2010-02-08 2:15am

Fox
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

i have a few frames like that what i did was i got a 22.2 steel post with knurling ( smooth post slipped) and made some shims out of a soda can
i get some pictures tomorrow...

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#3 2010-02-08 8:56am

stonie
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

RedFox wrote:

i have a few frames like that what i did was i got a 22.2 steel post with knurling ( smooth post slipped) and made some shims out of a soda can
i get some pictures tomorrow...

Thanks for posting......

I see what your talking about...like an SE post has knurling.
I did use the beer can trick for one of my display only
Pro Series since it won't be ridden.

So how did these frames with slightly larger seat tube id's
ship from the factory? Every frame I've run across has just
had the 22.2mm post and the clamp squashing the seat tube.
Clearly this can't be the way it shipped from the factory.
This is probably the cause of most seat tube cracks at the keyhole.
People just say screw it, put in the wrong size post and crank down the clamp.  roll

Did the factory shim these type frames and somewhere along the line
these shims magically disappeared? Or did they all come with larger
than standard diameter posts like 22.5 and 22.6mm?
If they did all come with larger diameter posts then where have
all the seat posts gone??


Gnarly is when it's beyond radical, it's balls out danger, & or perfection, & or skill or all of that combined. Nobody can shred like that guy, he's gnarly.                                        \m/  ( º . º )  \m/
*Shipping available to your Confirmed Paypal Address only, will not ship to a different address*

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#4 2010-02-08 5:04pm

stonie
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

So Redfox and I are the only people around here
that have frames with slightly oversized id seat tubes?   lol


Gnarly is when it's beyond radical, it's balls out danger, & or perfection, & or skill or all of that combined. Nobody can shred like that guy, he's gnarly.                                        \m/  ( º . º )  \m/
*Shipping available to your Confirmed Paypal Address only, will not ship to a different address*

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#5 2010-02-08 6:05pm

buddhashenglong
Pro Member"torque monster"
From: Colorado
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

http://i95.photobucket.com/albums/l122/Rich6372/IMG_1407.jpg This is a seat post Rich6372 is selling Schwinn 1/4 flash


Check out the Eclipse Show on KGNU.org Sunday 7pm MST Old School New School True School hip hop
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#6 2010-02-09 3:52am

Eric DeCastro
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From: San Diego, CA
Registered: 2008-01-23
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

stonie wrote:

So Redfox and I are the only people around here
that have frames with slightly oversized id seat tubes?   lol

my 91 GT performer has a slightly larger seat post mast.  I have a 22.2 in there right now and it moves when i ride.  I will do the soda can thing this week. it's the only thing that bothers me on that bike. (right now)


Righteous infliction of retribution manifested by an appropriate agent.

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#7 2010-02-09 4:34am

Blue_Max
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From: Madison, WI
Registered: 2008-08-19
Posts: 1048
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

my 87 gt performer that I sold last week had the slightly larger seat post mast, a normal 22.2 post would just slip even when the seat post clamp was tightened down and would still move side to side.


WANTED:
any 1 inch hoffman superforks with stem 95-97 versions,  90s 36-39 tooth bashguard sprocket,  black 1988 haro fst,  red 1998 hoffman condor frame,  black 1987-88 or 91 haro master.

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#8 2010-02-09 4:55am

Advan
Pro MemberHey Santa, you geriatric wanker...where's my bike?
From: Atlanta, GA
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

$10 micrometer off of ebay, shipped, and your worries about what you have and what you need will be all over.


Wanted- White Industries Freewheel 19T and 20T, and Big Gulp bars- because I think they look goofy enough to cruise with!

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#9 2010-02-09 7:52am

Taco
Bloody Plastic Seat
From: Omaha, NE
Registered: 2007-10-11
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

Most of the schwinns like the predators, etc from around 85-88 used the 22.5 posts big_smile

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#10 2010-02-09 8:57am

stonie
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

Advan wrote:

$10 micrometer off of ebay, shipped, and your worries about what you have and what you need will be all over.

Thanks for that tip on the ebay purchase, but my questions did
not pertain to anything along the lines of how to measure.
I have calipers that's not the issue.


Gnarly is when it's beyond radical, it's balls out danger, & or perfection, & or skill or all of that combined. Nobody can shred like that guy, he's gnarly.                                        \m/  ( º . º )  \m/
*Shipping available to your Confirmed Paypal Address only, will not ship to a different address*

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#11 2010-02-10 9:07am

stonie
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

Taco wrote:

Most of the schwinns like the predators, etc from around 85-88 used the 22.5 posts big_smile

Ok, thanks for that info Taco.
We are getting somewhere....nice.   big_smile

Ok, so now can anyone give us some info on how
GT's from the mid-late 80's came shipped.
Did they come shipped with shims, 22.5, or 22.6??


Gnarly is when it's beyond radical, it's balls out danger, & or perfection, & or skill or all of that combined. Nobody can shred like that guy, he's gnarly.                                        \m/  ( º . º )  \m/
*Shipping available to your Confirmed Paypal Address only, will not ship to a different address*

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#12 2010-02-10 9:18am

2009noob
Intermediate
From: Syracuse, NY
Registered: 2009-07-04
Posts: 260

Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

hmm

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#13 2010-02-10 9:26am

tmac
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

Same issue with my '83 Hutch Pro Racer and the '88 GT Pro Series I sold about a year and a half ago.  I had/have shims for both.  I have not seen/heard of 22.5 or 22.6 until now.  Is is possible that 7/8" posts are slightly larger and might work?

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#14 2010-02-10 10:37am

stonie
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From: Arizona
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

tmac wrote:

Same issue with my '83 Hutch Pro Racer and the '88 GT Pro Series I sold about a year and a half ago.  I had/have shims for both.  I have not seen/heard of 22.5 or 22.6 until now.  Is is possible that 7/8" posts are slightly larger and might work?

7/8" is the same as 22.2mm so it would still be too small of
a seat post for these larger inner diameter seat tubes.

Yea, my 88 GT Pro Series is hung on the wall with beer can shims in the seat tube  roll


Gnarly is when it's beyond radical, it's balls out danger, & or perfection, & or skill or all of that combined. Nobody can shred like that guy, he's gnarly.                                        \m/  ( º . º )  \m/
*Shipping available to your Confirmed Paypal Address only, will not ship to a different address*

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#15 2010-02-10 11:04am

smashedshins
Expert
From: Moncton New Brunswick, Canada
Registered: 2009-01-25
Posts: 517
Bikes: 4

Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

i have a norco that takes a 21.8mm seatpost. anybody got any of those??
it's so small the seatguts don't even want to fit on it. i needed to use a shim to hold it on.

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#16 2010-02-10 6:20pm

buddhashenglong
Pro Member"torque monster"
From: Colorado
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

Damn Schwinn and their odd sizing. I have an '01 Predator Trail that takes 25.7 and '85 Streetwise probably 22.5!


Check out the Eclipse Show on KGNU.org Sunday 7pm MST Old School New School True School hip hop
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#17 2010-02-10 10:09pm

b2187101
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From: Bowling Green, OH
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

I rode an 83 Predator back in the 80s and I put on a GT lay back post and I don't recall having to either shim it or have it slip?  Did Gt posts come in odd sizes like 22.5 or 22.8 back then?

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#18 2010-02-10 11:53pm

stonie
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

b2187101 wrote:

I rode an 83 Predator back in the 80s and I put on a GT lay back post and I don't recall having to either shim it or have it slip?  Did Gt posts come in odd sizes like 22.5 or 22.8 back then?

I really don't think GT "old school" seat posts came in
any other size than 7/8" (22.2mm).

That's why I think this 88 pro series probably came factory
with a 22.2mm post and a shim.

But I can't seem to get any of the GT people around here that really
know these old school bikes inside/out to chime in with an explanation.

Guess this thread either hasn't been seen by them,
or they don't care to share. Either way I am trying to
tap some knowledge here so we can all get the correct
seat post setup for our rides.

After all, if you ride a bike hard with the wrong seat post,
you could possibly crack the frame.


Gnarly is when it's beyond radical, it's balls out danger, & or perfection, & or skill or all of that combined. Nobody can shred like that guy, he's gnarly.                                        \m/  ( º . º )  \m/
*Shipping available to your Confirmed Paypal Address only, will not ship to a different address*

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#19 2010-04-08 8:42am

monsterman
Centurion Member
From: Omaha, NE
Registered: 2009-09-10
Posts: 158

Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

I am looking like crazy for a 13/16 or 20.7mm layback seatpost.

One just sold on fbay... http://cgi.ebay.com/ws/eBayISAPI.dll?Vi … K:MEDWX:IT

I tried to get it but every time I bid I was beat out. tongue

If anyone has one please let me know...it doen not have to have the brace.

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#20 2010-04-08 3:16pm

nintendoninja
"GT JUGGALO"
From: North Phoenix, AZ
Registered: 2009-04-17
Posts: 4261
Bikes: 9

Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

gt is 7/8" or 22.2
some times seatposts get thicker with paint or chrome...
sometimes seatpost tubes get enlarged/ bored out over time with seatposts sliding in and out and what not...
the tubing gt used was just stock tubing, back in those days they didnt measure tubing for inner diameter...
but the trusty old 7/8 size worked best, even with built up paint or chrome.
mystery solved, now go ride your gt and stop thinking about it lol

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#21 2010-04-08 3:44pm

stonie
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

nintendoninja wrote:

gt is 7/8" or 22.2
some times seatposts get thicker with paint or chrome...
sometimes seatpost tubes get enlarged/ bored out over time with seatposts sliding in and out and what not...
the tubing gt used was just stock tubing, back in those days they didnt measure tubing for inner diameter...
but the trusty old 7/8 size worked best, even with built up paint or chrome.
mystery solved, now go ride your gt and stop thinking about it lol

I totally disagree, as a 22.5mm seat post fits my 88 Pro Series
way better than a 22.2 mm. The frame has not been enlarged,
and has not been altered/severely worn inside the seat tube.

The mystery still is not solved!  tongue


Gnarly is when it's beyond radical, it's balls out danger, & or perfection, & or skill or all of that combined. Nobody can shred like that guy, he's gnarly.                                        \m/  ( º . º )  \m/
*Shipping available to your Confirmed Paypal Address only, will not ship to a different address*

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#22 2010-04-08 4:00pm

Kai
Pro Member"1982"
From: Colorado Springs, CO
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

I found an '88 PFT,all original except missing wheels.It had yer standard GT stamped 22.2 lean back post,BUT...it was shimmed.Original?You tell me.


The Mongoo$e rides

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#23 2010-04-08 4:21pm

FRESSTYLE FREEK
Pro Member(fantstik Spellr)
From: Fountain Valley, CA
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Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

smashedshins wrote:

i have a norco that takes a 21.8mm seatpost. anybody got any of those??
it's so small the seatguts don't even want to fit on it. i needed to use a shim to hold it on.

try a OS UNI hamerhead seat opst,seat  it came in 21.8MM

I think some companys just ran short on a certan size seat tube. so grabed one from a nuther pile that was a little biger. then just put in a cheap plastic shim. thats now toasted or lost? just a thought.wink

Last edited by FRESSTYLE FREEK (2010-04-08 4:25pm)


Kindness is like Manure dose You No Good unless You spread It around
YES I RIDE A PINK BIKE!! WANT TO MAKE SOME THING OUT OF IT!

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#24 2010-08-28 4:36pm

bt_cruiser
Museum Newbie
From: Texas
Registered: 2009-07-28
Posts: 5
Bikes: 1

Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

I have a 1985 or 86 PL24, and shimmed it with some platic off of a red solo cup.  I left just a about 1/8 showing at the top. I like the effect.  Its my daily rider and it has never moved.  I took it to the local bike shop and they claimed to remember the seat posts fit lose when it was new.  I also wrapped a couple bands of black electrical tape at the bottom of the seat post just to keep it from banging around in there.

I remember back in the 80s, one of my friends had a Schwinn Sting, It had two little shims, he was always droping them down the tube and having to fish them out.


Cruising for nastalgia.

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#25 2010-08-28 6:42pm

BRIMX
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From: South Jersey
Registered: 2008-11-15
Posts: 1106

Re: 22.2mm seatpost to small to fit old school frames.....22.6mm???

Bought this NOS post for my 87 Pro Series but didn't realize it was 22.6. Just a hair to large.

http://i961.photobucket.com/albums/ae97/crenoza6113/IMG_7692.jpg
http://i961.photobucket.com/albums/ae97/crenoza6113/IMG_7694.jpg

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