Inner tube 12 1/2x1,75x2 1/4 presta Michelin K4

Michelin K4 inner tube 12 1/2 x 1.75 x 2 1/4: a must-have for small wheels

When it comes to ensuring the reliability and comfort of a bike, the wheel deserves your full attention. And at the heart of every wheel, the inner tube plays a vital role. For kids’ bikes, balance bikes, or small trailers, the Michelin K4 inner tube, size 12 1/2 x 1.75 x 2 1/4, stands out for its build quality and rugged performance.

A Michelin K4 tube built for durability

Developed by Michelin, one of the world’s leading tire manufacturers, the K4 inner tube is made to last. It’s crafted from butyl rubber, known for its excellent air retention, flexibility, and resistance to punctures. This means more consistent pressure over time and fewer re-inflations — a real bonus for parents!

Perfect dimensions for small wheels

The 12 1/2 x 1.75 x 2 1/4 size fits 12.5-inch wheels, with tire widths ranging from 1.75" to 2.25". This makes it ideal for:

• Children’s bikes

• Bike trailers

• Some strollers and specialty equipment

Thanks to its specific format, the Michelin K4 tube ensures even inflation and a snug fit inside the tire and rim.

Schrader valve for easy inflation

This model features a Schrader valve (also known as a car valve), the same type used on most cars. It allows for fast and easy inflation with standard pumps, including those found at gas stations. Its wide, sturdy design makes it particularly user-friendly — perfect for families.

Why choose the Michelin K4 inner tube ?

A bicycle wheel is a system — tire, rim, spokes, and inner tube — that must work together to deliver a smooth, safe, and enjoyable ride. The Michelin K4 inner tube ticks all the boxes:

• Superior air retention

• Excellent elasticity for tire movement

• Easy installation on all 12-inch rims

• Compatible with a wide range of tire widths

• Premium quality from Michelin

In summary

If you're looking for a reliable inner tube for small bicycle wheels, the Michelin K4 12 1/2 x 1.75 x 2 1/4 is a safe bet. Durable, easy to inflate, and perfectly suited for kids’ bikes, it’s a key component for smooth wheel rotation, steady handling, and everyday peace of mind.