LIGHTWEIGHT 25.4mm BICYCLE ALLOY SEATPOST SADDLE STEM 300mm LONG

Product Information

Measuring a seat tube diameter is often necessary before purchasing, or changing the seatpost. How should one do that? Three methods will be explained here, but one can always be creative. 🙂 not a mention here of size 26.0 post on my old TREK antelope. That is the number stamped on the current post and it fits snug but slides nice so it must be correct. And the caliper confirms too. I am trying to find a seat thudbuster for that size. May be impossible as it looks to be a very rare size seatpost. suggestions? thanks, Brian maybe I should get a newer bike!!!!! It’s an antique. If the current seatpost is a well-fitting one, and it is 30.9 mm, I’d look for a 30.9 mm dropper seatpost.

Sorry, I meant that my seat tube is 30.9mm. What seat post would best fit in that seat tube, I was thinking 27.2 but wouldn’t that be too narrow?alot of bikes are made with missmatched seatpost and you will also find some bikes that have a build up of paint around the seatpost hole,on most older steel bikes you can remove that old paint build up with a smooth round file and chase up the correct size seatpost,even some weld splatter stops seat post from fitting correctly,very common on older bikes,you seatpost should fit in without too much force and should not be floppy when you slide it down,you can buy seat post in just about every size,the older 25.4mm ones can still be found on new steel bikes,discarded old bikes are a very good place to look for hard to find seatposts. I’ve only gotten four or five rides in with the new Thudbuster, but I’m quite impressed. The redesigned seat clamp is fantastic, and I found the new elastomer system to work very well. Unlike some of the softer, coil-sprung posts, the new Thudbuster offers a nice mix of chatter dampening and medium-hit suspension to take the edge off of sharper bumps. And, it doesn’t feel as if it has as much of an effect on pedaling efficiency as other, longer travel posts do.

Most seatposts are a lot wider than 15.75 mm. Machining the sidewalls down would weaken them tremendously in my opinion. So far I have not found any seat posts that are that small (no clue what became of the original) Any advise would be greatly appreciated. The first bicycle frames were made mostly from steel, with steel tubes of a standard (outer) diameter. The British and Italian standard diameter for seat tubes was 1 1/8″ (28.6 mm). Older French bicycles used 28 mm tubing. Old US bicycles (mostly BMX and older bikes that used one-piece cranks) was 1″ (25.4 mm).Don’t punch it in. If it can’t be eased in by hand, it’s probably too wide. Forcing it in makes it very, very difficult to move or take out later. It might even damage some frames. Yes, 26 mm is not the most commonly used size (though it is listed in Table 1 above), but I could find it online. Bike manufacturer says 'contraction of the market' following the pandemic has taken its toll on the sector

There's the Canyon VCLS (it stands for Vertical Comfort Lateral Stiffness) seatpost, which uses a 'v' shaped split to create two thinner strips of material and thus disrupt the buzz from that nasty tarmac before it reaches the rider.Method 1: if the frame already has a mounted matching seatpost – one that attaches firmly enough so it doesn’t slide, while being narrow enough to allow easy mounting and dismounting – then it is sufficient to measure its outer diameter, as was explained above in the section –“How to measure the seatpost diameter?”.