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What happened to 26.4 road seatposts?

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What happened to 26.4 road seatposts?

Old 01-06-19, 08:55 PM
  #1  
zjrog
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What happened to 26.4 road seatposts?


Well, changing to a new seat for my 86 KHS Fiero. Noticed this crack. Bummer. Amazon has Sunlite and Kalloy. I broke 2 Kalloy posts years ago, so, not interested in another. But can't seem to find this size in new seatposts at online retailers. Boooooooo... Will hit my local Bicycle Collective on Saturday...
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Old 01-06-19, 09:10 PM
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Old 01-06-19, 09:20 PM
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I've never seen a laprade without flutes ... and that's that shiny.

The co-op is a great choice, followed by searching ebay cycling products for "26.4."

You could also search for 26.6 if you don't mind a couple hours of filing/polishing.
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Old 01-06-19, 09:36 PM
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I forgot about them. Nice!
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Old 01-06-19, 09:43 PM
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Originally Posted by SurferRosa View Post
I've never seen a laprade without flutes ... and that's that shiny.

The co-op is a great choice, followed by searching ebay cycling products for "26.4."

You could also search for 26.6 if you don't mind a couple hours of filing/polishing.
Pretty sure I will skip the filing and polishing. Though, too bad I no longer in a shop with a machinist in house. Appreciate the idea though!

I remember getting this post in 91 or 92. And it was pulled from a bike that was too short, and the seat tube scratched the bottom section pretty bad. I'm using this bike on my trainer right now, so I'm not concerned with it failing on the road. Funny. You are the second person in 20 years you mention the non-fluted Laprade...
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Old 01-06-19, 09:46 PM
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The lower section was in this shape when I got it. After breaking a second Kalloy post, I was happy to have a better post...

I may see if I can clean it up some, just for giggles and conversation later...
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Old 01-06-19, 10:04 PM
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I am happy with the VO 26.4 post I have on my Motobcane.
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Old 01-06-19, 10:23 PM
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What happened to 26.4 mm seatposts is that French dimension steel frame tubes stopped being manufactured.
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Old 01-07-19, 12:48 AM
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English Too

Originally Posted by bertinjim View Post
What happened to 26.4 mm seatposts is that French dimension steel frame tubes stopped being manufactured.
And that plain gauge 531 fell out of favor?




From my '72 24" (ctt) Falcon San Remo, which is graced with a "531 Butted Frame Stays and Forks" sticker on the plain gauge seat tube, and 531 triangles on the forks. (Common practice to stiffen the larger frames.)
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Old 01-07-19, 02:44 AM
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That looks pretty nice and not a bad price. I've been using either vintage Campagnolo posts or Origin8 Unos from eBay. I still prefer Campy, but I'll remember that VO post as plan B next time I need one.
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Old 01-07-19, 04:15 AM
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The $5 Takara that I picked up recently has a 26.4 mm steel post. I had not yet looked for a replacement, since I only bought it for the usable parts.
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Old 01-07-19, 06:27 PM
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Seatpost shims are pretty available, and fairly easy to improvise, for that matter.
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Old 01-07-19, 06:40 PM
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https://www.ebay.com/itm/ACCENT-SP-2...HsYg:rk:1:pf:0

I bought a couple of these from Poland and am completely satisfied with the price, appearance and the quality. They did take about one month to arrive though.
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Old 01-07-19, 09:19 PM
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X2 on the 26.4 seatpost from Velo-orange, bought one for my 78 Supercourse, much nicer then the original, or anything else your going to find at the co-op.
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Old 01-08-19, 10:00 AM
  #15  
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Originally Posted by machinist42 View Post
And that plain gauge 531 fell out of favor? ...
In mid range frames, plain gauge 531 or CrMo was indeed popular in one or more frame tubes in the 1960s and 1970s. I can confirm that my plain gauge 531 Capo does take a 26.4mm post, whereas the butted 531 Capo takes the expected 27.2. Circa 1973, Nishiki addressed oscillation in its 25" Competition frames by switching to plain gauge CrMo in the downtube.
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Old 01-08-19, 10:33 AM
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Origin8 sells a 26.4 seatpost but I have no idea on the quality level.
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Old 01-08-19, 12:11 PM
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Those shiny Laprades with the height markings ALWAYS crack. I've had a couple cracked ones, and seen 3+ come into the co-op I volunteer at looking exactly like OP's picture
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Old 01-08-19, 12:36 PM
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Lots of 90s MTB seatposts in that size.

I have an NOS 26.4 Dura Ace 7400 seatpost, the one made by Easton. It's on my bmx bike 😂

if you want new I'm sure Thomson makes one. It'll be stronger than anything else.
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Old 01-08-19, 12:38 PM
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I have one of those posts on my PX10. Looks nice and it works fine. It's basically a Nitto S63 knockoff.

At the time I built it up Simplex posts were going for $200 on ebay, and I just could not justify that. My current PX10 was put together from a mostly bare frame, and building up with all correct parts would have been over $2000 at ebay prices! For perspective, I bought my first PX10 complete with the Simplex seatpost and Brooks B17 special for $100 in 1991.

That said, I noticed vintage prices have come down a lot in the last couple years. It's probably possible to get a vintage Simplex 26.4 post for only $100 or so nowadays.
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Old 01-08-19, 04:41 PM
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Had an opportunity to visit my local collective. Found 2 fluted Laprade posts, 27.2 and 26.6... Bought the 26.6. $3... My digital calipers say it is 26.5... And no. It won't even start in the seat tube. Bummer...

Bought a Promax branded post with some elastomer in it, should fit my 91 Trek 7000 mtb I keep at work. And no idea what brand the black post is, but it is 26.4...
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Old 01-08-19, 04:50 PM
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Thanks for all the replies! Good info, appreciate the sharing. I do hope someday to do a real restoration on a bike worthy of such. This old KHS has more sentimental value, and I swapped out 12 speed friction stuff for 2x10 105 5600 brifters and derrailure, Tektro brakes for the 27" to 700c swap. FSA Vero compact crankset. Reused the bars, stem and fork I lifted from a smashed 85 Nishiki Prestige nearly 30 years ago...
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Old 01-09-19, 03:40 AM
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Originally Posted by zjrog View Post
Bought the 26.6... Digital calipers say it is 26.5. And no, it won't even start in the seat tube. Bummer.
Nothin' some 80 and 600 grit sandpaper can't solve.
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Old 01-09-19, 05:53 PM
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26.6 + sandpaper + elbowgrease = the new 26.4
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