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Questions and answers about sports

What kind of bicycle clamps are these?

5 min read

Asked by: Dwight Nelson

How do I know what size seat clamp I need?

Note: The seat clamp diameter needs to match the diameter of your seat tube rather than your seatpost, which is a little smaller. For example, a 27.2mm seatpost (a size commonly found on road bikes) fits inside a 28.6mm diameter seat tube, so it’s a 28.6mm clamp you need.

What holds a bike seat in place?

1 – Seat collar/clamp: This is a small, circular, metal clamp that is used to hold the seat post in place and prevent the saddle from moving or slipping into the seat tube. 2 – Saddle/Seat: The portion of the bicycle that the rider sits on to pedal a bicycle.

What is a seat clamp?

Seat clamp is used to secure the seatpost when inserted into the bicycle frame. It comes with different diameter as each bicycle seat tube varies in its diameter. It is important to note that the internal diameter of the seat clamp must be similar to the external diameter of the seat tube.

How does a bike clamp work?

The seat post clamp goes around the top of the tube. When the clamp bolt is tightened, the frame material flexes slightly (the slot allows this flex to occur) and tightens against the seat post. This, of course, is what holds your post in place.

Are all bike seat posts the same size?

Seatpost diameters generally range from 22 mm to 35 mm in 0.2 mm increments. The most common size is 27.2 mm (1.07 in) for most bikes, especially for the higher-quality models. BMX bikes commonly use 25.4 seatposts. In some modern bikes with thicker alloy or carbon tubing, larger diameters such as 30.9 mm are used.

How do you measure seatpost clamp diameter?

Quote from video: Now you can use your caliper set to millimeters to measure the outer diameter of your frame on opposite sides of the sea tube some of these sizes are close like 34.9 millimeter and 36.4 millimeters.

How do bike seats attach?

Quote from video: Step 1 loosen the screw on the back of the bottom of the old seat on your bike. Using the properly sized allen wrench that fits your screw loosen. The screw enough so the seat is removable.

How do you attach a saddle to a seatpost?

Quote from video: And adjust the saddle on a to bolt seat post so in a two bolt seat post how this works is the saddle the two rails. Like we we have on this one these two rails.

What are the different types of bike seat posts?

bicycle seatpost materials

  • Alloy seatposts are the most affordable option and the easiest to install. …
  • Titanium seatposts are lighter than aluminum and provide a softer ride, albeit at a higher price tag.
  • Carbon fiber seatposts offer the lightest, softest ride.

How do you replace a bike seat clamp?

Quote from video: Start by loosening the clamp and raising the seat post as much as possible. You may need to feed excess cable into the frame in order to fully remove the dropper. Post.

Are bicycle seatposts universal?

While there are any number of post diameters out there, most modern road and MTB bike frames accept a seatpost of either 27.2mm in diameter (‘standard’), 30.9 or 31.6mm (‘oversize’).

How do you open a seat clamp?

Quote from video: One is there is a pin in your clamp. Make sure it's in the cutout area here on the back of the seat tube.

How do you make a bike seat more comfortable?

10 Ways To Make This Happen

  1. Use an adjustable saddle pad with gel inserts. …
  2. Choose a padded seat cover. …
  3. Look into getting a custom-fit seat. …
  4. Consider buying a new seat every year. …
  5. Buy a seat designed specifically for cyclists. …
  6. Try sitting on a chair first. …
  7. Don’t forget about your back! …
  8. Use gel inserts instead of foam.

Can I cut my bike seatpost?

Condensed answer: A bicycle seat post can be cut as long as the new size respects the minimum insertion length of the seat post. Ignoring the minimum insertion length and cutting too much of the seat post will result in extra stress on the frame (seat tube) and may cause a crack.

What is a dropper post on a bike?

In essence, the dropper post is a handlebar remote-triggered component that adjusts your riding height in seconds, allowing you to always be in the most stable possible riding position, whether climbing or descending. Shop dropper posts.

What size seat clamp do I need for a 34.9 seatpost?

Clamp diameter: 34.9mm. Seat Post Fit: 31.6mm. Weight: 25g.

How do you measure the diameter of a seat tube?

Different bicycles require different diameter seatposts. To find out the diameter of your seatpost, you must remove the seatpost from the bicycle frame and look for the size, which is stamped just below the “Minimum Insert” line toward the bottom. The number will be a three-digit number (such as 26.8 or 27.2 or 31.6).

What size seat clamp do I need for a 25.4 seatpost?


28.6mm seat post clamp applies to 25.4mm seat post.

Why does my seatpost keep slipping?

The main reason for a slipping seatpost is too little friction between the seatpost and seat tube. The first cause is a clamp that isn’t tightened enough. Because of the load on the seat post while cycling, it slowly slips down. This is a very common issue!

Should you grease your seatpost?

Greasing your seatpost will prevent problems like this: “Removing Seat Post rusted into downtube”. Don’t use chain oil, grease is what you want. As whatsisname pointed out, all fasteners on your bike should be lightly greased. This is what keeps them from corroding and seizing over time, becoming a real pain to remove.

How tight should seat post be?

Senior Retro Guru. If you have the right size post you should not have to crank down the clamp to stop it from slipping – a correctly fitted post will slide smoothly into a greased seat tube with very little effort and should stay put with only a firmly tightened QR.