Air tube Schwalbe 700x28C/45C schrader

28-inch bike inner tube: a key component for a smooth ride

The 28-inch bike inner tube is a crucial yet often overlooked part of any bicycle. It plays a major role in ride quality, comfort, and safety. Whether you ride a city bike, road bike, trekking bike, or even an electric bike, choosing the right inner tube can make all the difference.

What is a 28-inch inner tube ?

An inner tube is a rubber bladder that sits inside the tire and holds the air pressure. The term "28 inches" refers to the diameter of the wheel it fits, approximately 700 mm, which is a standard size for many adult bikes—especially road bikes, commuter bikes, gravel bikes, and some electric bikes.

Key features of a 28-inch inner tube

Here are the main specifications to look for when choosing your inner tube:

• Size (ETRTO): A 28-inch inner tube typically matches tires with an ETRTO range of 28-622 to 47-622. The ETRTO marking (e.g. 700x35C) ensures compatibility between your tire, rim, and tube.

• Valve Type: There are three common types:

  • Schrader valve (wide valve): Like those on car tires, great for urban bikes.

  • Presta valve (narrow valve): Ideal for road bikes and narrow rims.

  • Dunlop valve: Less common, mainly seen on classic city bikes.

• Rubber thickness: Some inner tubes are reinforced to resist punctures, while others are lighter for performance.

• Weight: Important for performance-oriented cyclists—a lighter tube improves bike responsiveness.

Why choosing the right 28-inch inner tube matters

An ill-fitting inner tube can lead to frequent punctures, inefficient inflation, or premature tire wear. It’s essential to select a tube that matches your tire width, rim valve hole, and riding style.

Benefits of a high-quality inner tube :

• Better air retention

• Fewer pinch flats and punctures

• Enhanced riding comfort

• Easier installation on the rim

Which bikes use 28-inch inner tubes ?

A 28-inch inner tube is commonly used on:

• City bikes

• Touring bikes

• Road bikes

• Gravel bikes

• Some electric bikes (urban or trekking e-bikes)

Be sure to check your tire’s size before purchasing to ensure a perfect fit.

Maintenance and replacement tips

With proper care, an inner tube can last a long time:

• Regularly check your tire pressure.

• Inspect the rim tape to avoid internal punctures.

• Replace the inner tube if it gets punctured, torn, or starts leaking air.

Pro tip: Always carry a spare inner tube on your rides!

Conclusion: how to choose the right 28-inch inner tube

Picking the right 28-inch bike inner tube for your wheels, tires, and riding needs ensures smooth, safe, and enjoyable rides. Look at the ETRTO size, valve type, and whether you need durability or performance.

An inner tube may be hidden, but it’s the true heart of your wheel—keeping you rolling mile after mile.