Which seatpost

The majority of modern seat posts are The wider the post the stiffer the ride. Many race frames have a Having said that, some race frames also use Make sure you have the correct length of seatpost for your needs. Seatposts are available in several lengths from mm to mm so measure the amount of post you have showing plus the minimum amount of insertion that needs to be in the seat tube before purchase.

If in doubt, measure your old post. Whichever length you choose remember to not exceed the recommended minimum insertion limit on the post. The amount of layback — ie. A post with a lot of layback will result in the saddle being further from the bars, putting you in a more stretched out position. If you feel the saddle is too far back or for efficient pedalling or for time trialling where you want to be further forward , an inline post with no layback is a better option.

The cradle or clamp at the top of the seat post which holds the saddle rails can tilt forward and back to allow you to fine tune the saddle position. The saddle clamp will be held in place with one or two bolts. Look up what a Vernier caliper actually is. Finally, the suggestion that a less than 0. Any halfway decent clamp should easily account for 1mm error or more. Although it seems a bit snarky, your comment has been very useful. One of the WordPress updates seems to have removed labels on picture galleries where more than one picture is placed side by side.

I will correct the term once I double check the proper English technical terminology. As for the 0. Thank you for what is in effect a very helpful, constructive feedback. If you find any other mistakes, feel free to note them. I try to keep this as correct, and up-to-date as possible. Most of your information is geared towards the later 20th Century bicycles. I measured it with a digital caliper and it reads 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.

Machining the sidewalls down would weaken them tremendously in my opinion. Painting, or chrome plating could also be done — just take it into account when machining to not have the new seatpost too narrow, or too wide. More than happy to help however I can. Good luck! If all else fails, and taking a frame to a certified carbon repair shop is not an option, that could be attempted.

Will it work well? What I would try is to create leverage to remove the seatpost. Fred here again. I read your article and it prove most useful. I measured my seatpost diameter and it turn out to be 40mm. I know it is large by modern standard do you have any idea where i can find such a seatpost clamp.

I would love to know why every Infuriating :. Joking a bit. I value quality and precision over quantity, but it seems that many manufacturers have a different view on that. No other explanation comes to mind. The standard seems to be considered obsolete. Locally in Novi Sad , I can source Hi, My bike frame seat post is I have a Merida Big 9 15 by the way.

If the current seatpost is a well-fitting one, and it is Hi Relja, Sorry, I meant that my seat tube is What seat post would best fit in that seat tube, I was thinking Also I am having trouble looking for Do you know any dropper post which suits what I mentioned above? The seatpost depends on the inner seat tube diameter. Over the last decade, bike manufacturers have been optimising their bikes around comfort, and the seat tube has been the main focus.

Giant created a unique seatpost shape called D-Fuse which will flex around 12mm underneath you. And Cannondale has stuck with something a bit more traditional, using a smaller-than-usual seatpost diameter paired with a flat-section carbon layup to achieve a super comfortable ride.

A handful of aftermarket seatposts can match the vertical flex and vibration damping of the Trek, Giant and Cannondale designs, allowing you to transform whatever you ride into something that rides ultra smooth. Carbon, Aluminium and Titanium Seatposts Seatposts are manufactured using three different construction materials. The majority are made from aluminium which is lightweight, reliable and very cheap to manufacture. Titanium seatposts are much less common and are typically paired with titanium frames for a nice aesthetic.

Carbon seatposts are lighter and more expensive, but more importantly, they can be optimized using different layering techniques to achieve an unparalleled ride quality. Suspension Seatposts There is a handful of suspension seatpost manufacturers, but perhaps the most common is Cane Creek.

The advantage of a suspension seatpost is that it will help absorb big hits and other impacts from the ground below, allowing you to pedal through bumps while also reducing the fatigue on your body.

Suspension seatposts have been measured to be multiple times more effective than any rigid seatpost. The main disadvantage is the increase in weight. Elastomer Seatposts Specialized has been incorporating elastomers into their flex seatposts for over a decade so that they can achieve their desired ride characteristics.

The latest-generation carbon elastomer post pictured on the right is said to offer 18mm of vertical flex, is reasonably lightweight and is also reliable as there are no moving parts.

Straight and Setback Seatposts Seatposts are available in different offsets ranging from 0 degrees to 35 degrees. A setback post puts you further behind your crankset and a straight seatpost moves you closer. The amount of setback or offset is best determined through a basic bike fit at a participating bike shop. A seatpost that dampens vibrations effectively will insulate a rider from much of the road buzz coming up through their bike.

Seatposts with the best damping characteristics have been tested to be more than twice as effective than those which perform poorly.

There is a caveat here! This data only applies to bikes without luggage fitted. A seatpost with more deflection will reduce the fatigue on your body as it protects you from harder jolts like unexpected potholes or dirt road corrugations.

When testing seatpost deflection, two axes of measurement are usually taken — vertical and horizontal — but they almost always track proportionately. The Velo Magazine lab test data shows that under the specific force applied, some seatposts were able to deflect twice as much as others. The results are a bit hard to read, so let me type that out: 1.

Cane Creek Thudbuster ST Ritchey Carbon Straight 5. Ritchey Carbon Setback 5. Cannondale Carbon 5. Zipp Straight Aluminium 4.