FAQ: What Seat Post Size Is Bike?

What size is a standard bike seat post?

The dimensions of the seat tube can vary from bicycle to bicycle, so when choosing a seatpost, it’s important to get the correct diameter. The most common diameter is probably 27.2mm, but other sizes between 21.15 and 35mm are often found, as well. Seatposts also vary in length.

How do I know my bike seat post size?

To measure, you place the rod inside the seat tube and match the diameter. The rods are designed to have an increasing diameter from one end to the other. Therefore, the correct reading, which matches, is the one above the end of the seat tube.

Are bike seatposts universal?

Are bike seats universal? Yes, most modern bike seats are universal and can be interchanged with different seat posts. It’s best to check the number of rails and the rail width on your saddle to ensure a correct fit to the seat adapter.

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How long should my seat post be?

a) Seatpost should end at least 25 millimeters below the lower part of the horizontal tube weld to the seat tube. b) Total inserted length should be at least 90 mm from the top end of the seat tube.

Are all 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.

What size seat clamp do I need for a 28.6 seatpost?

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.

Can I put a longer seat post on my bike?

Though some brands like to play exception to the rule, the majority of bikes are designed to fit a seatpost of either 31.6mm or 27.2mm. However, whilst you can always cut a seatpost that’s too long, you can’t add to the length if it’s too short.

What size is a Schwinn seat post?

These are what you need for your classic Schwinn bicycle. American made by Wald in 20.6mm diameter. The diameter at the top of the seatpost where seat rail clamp sits is modern 22.2mm diameter.

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How much does a bike seat and post weigh?

We can conclude that saddles weigh mainly around 300g, whereas seat post weighs in the range of 150 to 400g. This range can fluctuate greatly with the material used to fabricate seat posts.

How do I know my bike tube size?

The best way to check what size inner tube you need is to look on the sidewall of your tyre. Tyre manufacturers print the size on the sidewalls, so look out for numbers such as ‘700x23c’ for a road bike, or ’26×1. 75′ which is for mountain bikes.

Can a Schwinn bike seat fit any bike?

Compatible with most adult bikes.

Can you cut a bike seatpost?

Cutting the post down is the proper way to do it really. Seat posts need to have a minimum amount of tube in the frame for safety though, so do some measuring and just cut off as little as you can get away with and file down any rough or sharp edges.

Does seat post length matter?

Seatpost length is a further consideration. While a longer post is generally regarded as offering more comfort, the amount of post ‘sticking out’ of the frame will largely be dependent on your frame size/ geometry and your own dimensions (inside leg length etc).

How are seat post clamps measured?

Seat post clamp size refers to the inside diameter size of the clamp. This should correspond to the outside diameter of bike frame where the clamp is used. Just measure the outside diameter of the frame where the clamp will be used.

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