E_is_Chill

I'm 6'0 and 290, I'm looking for a new steel 26.6 seatpost for my schwinn world sport because the original one is too small, about 7 inches long. I think I'll need something thats almost twice that length.

I'd ask for an aluminum seatpost recommendation, but I feel like I should probably stay away from aluminum.

mattgmann

aluminum seat posts are pretty strong. I really doubt you'd have any problems. I picked up one of these, https://www.nashbar.com/bikes/Product...2_547690_-1___, from nashbar. It's pretty heavy gauge. I'm not as big as you, but I was riding it on a smaller frame with a lot of extension and there was no flex.

edit - didn't pay attention to the 26.6mm diamater. my recommendation is useless.

JBHoren

Are you certain that it's 26.6, and not 26.8? Because if 26.8 works, here's what you want:

https://www.rivbike.com/product-p/sp2.htm

I had one, and (then) at 6'1" and your weight, it worked like a champ. Give a look.

Wilfred Laurier

my experience, with one exception, is that steel seatposts are made to be cheap, not strong.

THe one exception I have seen is a cromoly Tioga seatpost I bought in the early 90s - 400 or 450 mm that outlasted the bike i bought it for.

Also, my weight varies from ~260 - ~280 and I have had luck with basic aluminum seatposts. I have bent a few seatposts on my mountain bike that has ~300mm of seatpost sticking out, but ironically these have been 'brand name' seatposts, not the distributor-branded chinese seatposts that work well in my city and commuting bikes. These posts are also available in just about every diameter, unlike the more expensive posts like Thompson (the gold standard) which are usually only availalbe in a few common sizes (and 26.6mm is generally not one of them)

Also, you might want to consider having someone experienced in bike fit check out your setup on the bike. If you need to have 10" of seatpost exposed on an old road bike then the bike is likely significantly too small for you, and this makes a much bigger difference to your ability to ride and to enjoy the ride.

Edit:

My mistake: Thompson seatposts are available in 26.6mm diameter X 330mm (approx. 14") Kind of a lot of money to drop on an odd size seatpost for an old Schwinn unless you are sure you will be keeping the bike for a while.

E_is_Chill

I just need the seat raised just half an inch, and I'm way past the limit on the seatpost. The seat post is actually 6 inches, according to the max line on the seatpost I'm only supposed to be using 4 inches, but instead it's 5 inches out. I just need a more of the seatpost to be in the seat tube.

Wilfred Laurier

OK good to hear.

If you don't have a lot of seatpost exposed then you will be fine with a standard $20 aluminum post from the LBS - I promise. As long as you are not planning on doing experiments in jumping and doing stunts while seated. Like I said before, steel seatposts are sold because they are cheaper, not beczuse they are stronger. They are almost always less strong than decent aluminum seatposts. Whatever seatpost you choose, be sure to grease it well before insertion.

Nightshade

I had a custom bent layback seat post made from stainless steel rod. At 350+ I bent every tube seat post I tried. The new stainless post will not bent but is a it heavy.

JerrySTL

Here's some AL seatposts that should do the job. 300 mm should be long enough.

https://www.bikeparts.com/categories/...1&f%5B%5D=1870

When you install it, make sure to put a light coat of grease or anti-seize compound on it.

Arvadaman

Chill,

It is not steel, but I like these. I have several of them and they have worked well. The two bolt design is Clyde friendly. Find a shop who can order or on Amazon. They have lots of sizes for older bikes.

https://www.origin-8.com/?page_id=91&...cl1=SEAT+POSTS

E_is_Chill

I'm probably going to go with the Kalloy Straight seatpost

fietsbob

I really like Brompton's pentaclip on plain type seatposts.. they are stepless to get the saddle angle right.
NYC Source
https://www.nycewheels.com/brompton-folding-bike.html
this is the part
https://foldabikes.com/PriceListHTML/...pentaclip.html


steel? for a long extension I got a Straight Chromoly seat post from Red Line
but they're only made in 1"
or 7/8 " as a straight piece.. the top is 7/8" in all cases.

then you would seek out an adapter sleeve for the difference to go in the frame,
then the 1" post goes in It.

donalson

i've got 2 of em... one white one black... I never had a problem with them even at 330ish lbs on a to small for me frame (aka LOTS of exposed post)... it's no light weight but it seems to do the job.

that being said... I prefer thomson seatposts... but the origin8 is literally 1/4 to 1/3 the price

Wilfred Laurier

my god that thing is a work of art!
simple beauty not seen on a bicycle since snutour power ratchet shifters

craigrrr

I have a Thomson seat post and at 320# not a problem. I have another in the garage I will look for it and see what size it is, might have to sell some things I am not using any longer

Leebo

+3 for the thomson seat post. Aluminum and highly recommended.