2 inner tubes 20 inches schrader

Choosing the right 20 inch inner tubes for a kids’ bike: features and tips

The 20 inch inner tube is a key component of the tyre system on a children’s bike. It ensures comfort, safety, and performance whether your child is riding to school, going on a family outing, or heading off on their first off-road adventure. To ensure a smooth ride and avoid frequent punctures, it’s important to choose the right tube. Here’s everything you need to know about its features, specificities, and how to make the right choice.

What is a 20 inch inner tube ?

The inner tube is a flexible rubber or butyl tube placed inside the tyre. Inflated with air, it maintains the pressure needed for proper rolling on pavement or dirt trails. A 20 inch inner tube is designed for bike wheels with a 20-inch diameter—roughly 50 cm.

This size is common on bikes for children aged 6 to 9, depending on height and riding style (city bike, junior mountain bike, BMX, etc.).

Key features of a 20 inch inner tube

1. Compatible Sizes
   A 20 inch inner tube typically fits tyres with a width between 1.50 and 2.125 inches, sometimes more depending on the model. It fits rims with a 406 mm diameter (ETRTO 20 x 1.75, for example). Always check the standard printed on the sidewall of the tyre.

2. Valve Type: Schrader or Presta
   Two valve types are commonly available:

   • Schrader valve (wide valve): Similar to car tyres, it’s robust and easy to inflate—perfect for kids’ bikes.

   • Presta valve (narrow valve): Lighter and often used on sportier bikes, it requires a special pump head.

3. Materials
   Most inner tubes are made from butyl, a synthetic rubber known for its airtightness and resistance to temperature changes. There are also latex models—lighter but more fragile—rarely used on children's bikes.

Why replace an inner tube ?

A puncture, gradual air loss, or general wear and tear may require replacing the inner tube. A cracked or overly patched tube can compromise your child’s safety, affecting the bike’s stability and handling.

How to choose the right 20 inch inner tube

• Check the tyre dimensions, usually printed on the sidewall (e.g., 20 x 1.75).

• Choose the correct valve type for the bike’s rim and your pump at home.

• Go for quality, especially if the bike is used regularly. A good tube holds pressure well, offers smoother rides, and lasts longer.

• When in doubt, choose a versatile model that fits several tyre widths (e.g., 20 x 1.75/2.125).

Pro tip: keep a spare tube handy !

Whether it’s on the way to school or out for a weekend ride, a puncture can quickly ruin the fun. Having a spare 20 inch inner tube in your backpack or garage means you can fix the issue quickly and get back on the road.

In summary

20 inch inner tubes are designed for children’s bike wheels and should not be overlooked. Double-check tyre compatibility, pick the right valve, and choose a reliable tube to ensure safe and enjoyable rides. It’s a small detail that makes a big difference in your child’s cycling experience.