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Questions and answers about sports

Is there a non-proprietary standard for oval seat-tube/post?

5 min read

Asked by: Ryan Castillo

Are seat posts 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’).

Are all seat posts the same?

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.

Are seatposts interchangeable?

It’s rare nowadays to find a bike seat that doesn’t fit a regular seat post. Pretty much most modern seats are interchangeable and will fit most bikes. There are exceptions like dirt jump bikes, racing bikes, BMX bikes, or super expensive bikes.

How do I know what size bike seat post I need?

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 are the different types of bike seat posts?

Alloy, titanium and carbon are the three materials to choose from. Alloy posts are relatively light, cheaper and easy to install and maintain but they can be a harsh ride. Titanium posts are expensive but light and offer a softer ride. Carbon posts are not only lighter but can also soften the ride.

Do all saddles fit all seatposts?

The rails of a saddle create a frame under the seating area that fits into the clamp at the top of your seatpost. Most modern bikes conform to the same standard, so any reputable saddle will fit any reputable bike.

How do I know if I need an offset seatpost?

Straight and Setback Seatposts



The amount of setback or offset is best determined through a basic bike fit at a participating bike shop. They will look at the relationship between your knee and pedal axle, as well as your hip angle/mobility and will determine how far you should sit behind your crankset.

Does seatpost offset matter?

The zero offset helps to put those folks over the pedal easier. Zero offset posts also work well if the top tube (real or virtual) is longer then ideal. Moving the seat forward reduces the distance between the stem and the saddle.

How do I choose a seatpost?

Quote from video: There's a very simple method which is to go ahead and loosen up your seat clamp bolt here slide your saddle. And your seat post out. Look at the seat post and see if there's a number printed on there.

Can you put a dropper post on any bike?

Dropper seatposts, or popularly referred to just as dropper posts, are one of the best upgrades you can make to any mountain bike.

Are all bicycle saddles Universal?

Bike saddles come in different sizes to accommodate different body types. Finding a bike saddle that is the right size for your body mostly has to do with the width of the saddle and how well it supports your ischial tuberosities (sit bones).

Are bike suspension seatposts any good?

A suspension seatpost is a great comfort upgrade, as it will both absorb bigger hits, as well as dampen vibrations coming up from the road. This essentially means you’ll feel fresher at the end of a long ride. For anything slow and off-road, you cannot beat a spring-damped seatpost.

What seatpost has the most setback?

These two-bolt seat posts have a generous 30mm of setback, among the longest ever. This is very important for those who ride leather saddles that often have little fore-and-aft adjustment due to the short rails.

Can you put a carbon seatpost in an Aluminium frame?

Quote from video: Похожие запросы

Are bicycle seats universal?

While “most” bicycle seats are universal and interchangeable, not all bicycle seats are interchangeable or universal. However, the good news is that most modern bikes and brands have accepted that one fitting is best.

What size are standard saddle rails?

7mm

Non-carbon saddles are typically made with round 7mm rails that fit all standard seat post clamps. Carbon saddles however, are made with an oval rail that measures 7mm wide X 9 mm tall.

Are all bicycle saddles Universal?

Bike saddles come in different sizes to accommodate different body types. Finding a bike saddle that is the right size for your body mostly has to do with the width of the saddle and how well it supports your ischial tuberosities (sit bones).

Are bike seats a standard size?

Common bike saddle sizes range from 135mm to 160mm, depending on individual sit bone width. The type of saddle you need, however, is influenced by many other factors like posture, discipline, and even personal preference. There are two main saddle types: Performance saddles: saddles used for racing and endurance.

What happens if your bike saddle is too wide?

A bicycle saddle that is too wide causes chafing due to your thighs rubbing against the sides of the seat and reduces pedal efficiency since the saddle interferes with your pedaling motion. Also, aerodynamics is worsened from the increased contact area between your spread-out legs and the increased air resistance.

How do I choose a seatpost setback?

Straight and Setback Seatposts



The amount of setback or offset is best determined through a basic bike fit at a participating bike shop. They will look at the relationship between your knee and pedal axle, as well as your hip angle/mobility and will determine how far you should sit behind your crankset.