Why Modern Bikes Use Thru Axles Instead of Quick Release

If you’ve shopped for a new bike recently, you’ve likely noticed that most modern models use thru axles. This shift is not accidental—it’s driven by advancements in cycling technology.

The Rise of Disc Brakes

Disc brakes generate more force than rim brakes, which can cause flex in quick-release systems. Thru axles provide the stability needed to handle these forces.

Improved Frame Design

Modern frames are designed for stiffness and aerodynamics. Thru axles complement these designs by ensuring precise wheel alignment.

Better Handling

Thru axles improve handling by reducing flex between the wheel and frame. This is especially noticeable in corners and descents.

Standardization Trends

The cycling industry is moving toward standardized axle sizes, such as:

12mm thru axle (road and gravel)

15mm thru axle (front MTB)

Are Quick Releases Becoming Obsolete?

Not entirely. Many entry-level and older bikes still use quick-release systems. However, for high-performance bikes, thru axles are becoming the norm.

Conclusion

The shift toward thru axles reflects the evolving demands of modern cycling. While quick-release systems still serve a purpose, through axles offer clear advantages in performance and safety.