How to Pick the Right Bicycle Tube Size

May 9, 2023

4 minute read.

If you're an avid cyclist or just starting out, you know that having a properly functioning bike is crucial to an enjoyable ride. One of the most important components of your bike is the inner tube, which keeps your tires inflated and ensures a smooth ride. However, selecting the right bike tube size can be confusing, especially for beginners. But fear not, we’ll dive into the factors to consider when choosing the right bike tube size, the different valve options available, the range of widths, picking the right valve stem, durability, self-sealing or basic tubes, and thorn-resistant options.

Bike Tube Sizing

First things first: understanding bike tube sizing. As mentioned in the introduction, bike tube sizing mirrors bike tire sizing, with the exception that tubes will list a range of widths due to their ability to stretch. So, if your bike tires are labeled as 27.5 x 2.3, you'll want to make sure that any new bike tube you purchase has a width range that aligns with those measurements.

Another example, if your tire is 26 inches in diameter and 1.3 inches wide, you can buy any range of tube width that covers 1.3, as long as it's made for a 26-inch diameter wheel. So, if you find a tube that's 26 x 1.1-1.5" or 26 x 1.2-1.7", they will both work for your tires. Most bike tubes will list a range of widths on their packaging or on the product description online, so be sure to check before making a purchase.

But how do you measure your bike tire to determine its size? One easy way is to look for the size markings on the sidewall of your tire. This will typically include the tire width, followed by the diameter (in inches). For example, a tire labeled 700 x 25c means that the tire has a width of 25mm and a diameter of 700mm. Once you have this information, you can find a tube that matches your tire size and width range.

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Valve Types

Next, let's talk about valve options. There are two main types of valves: Presta and Schrader.

Presta valves are typically found on higher-end bikes and have a narrower stem. They require a different type of pump head and can be a bit trickier to inflate.

Schrader valves, on the other hand, are the same type of valve you'll find on a car tire. They have a wider stem and are easier to inflate. When selecting a tube, make sure to choose one with the correct valve type for your bike.

Presta bike tube next to schrader bike tube

Presta pictured on the left, Schrader on the right

It's important to note that the valve type on your bike tube must match the valve hole on your bike rim. This is because the valve hole is designed to fit a specific valve type and attempting to force a different valve type into the hole can cause damage to both the valve and the rim. So, before purchasing a new bike tube, check your bike's rim to determine the valve type you need.

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Valve Stem Length

Picking the right valve stem is another consideration when selecting a tube. Valve stems come in different lengths, and you'll want to choose a length that's appropriate for your rim depth. If the valve stem is too short, it can be difficult to attach a pump head. If it's too long, it can stick out and potentially cause damage to the tube.

Other things to consider in Tube Selection

Durability is also a crucial factor to consider when selecting a tube. Some tubes are designed to be more durable than others, which can be important if you're planning on doing a lot of cycling. Look for tubes that are made with high-quality materials and have reinforced seams to prevent punctures.

Self-sealing or basic tubes are another option to consider.

Self-sealing tubes contain a sealant that can help prevent flats. If you frequently ride on rough terrain or encounter a lot of debris, self-sealing tubes may be a good option for you.
Basic tubes, on the other hand, do not have sealant and are a more affordable option.

Thorn-resistant options are available if you frequently ride in areas with a lot of thorns or other sharp objects. These tubes have an extra layer of protection that can help prevent punctures.

In conclusion, selecting the correct bike tube size, valve type, range of widths, valve stem, durability, self-sealing or basic tubes, and thorn-resistant options are all important factors to consider when choosing a bike tube. By taking the time to choose the right tube for your bike and riding style, you can help prevent flats and enjoy your ride to the fullest.