Why Every MX Rider Should Wear A CTi3 Knee Brace

Motocross pushes riders and machines to their limits. Between hard landings, deep ruts and aggressive cornering, the knees are constantly exposed to high-impact forces and unpredictable twisting movements. Research consistently shows that motocross is a high-risk sport, with serious orthopaedic injuries occurring regularly among riders.

For this reason, MX knee protection isn’t just about recovery after injury but about riding smarter from the start. A well-designed motocross knee brace can play an important role in supporting joint stability, managing impact forces and helping riders maintain confidence through jumps and turns.

In this blog post, we’ll explore why knee injuries are so common in motocross, how functional knee bracing helps manage the stresses riders face on the track and why the CTi3 brace for motocross is trusted by riders who demand reliable protection without sacrificing performance.

Motocross as a high-risk sport

Motocross places unique physical demands on the body, combining speed, height and unpredictable terrain in a way few other sports do. Riders are repeatedly exposed to high-energy impacts, awkward landings and sudden changes in direction, all of which place significant load on the knee joint. Over the course of a ride or race day, these forces compound, increasing both acute injury risk and cumulative joint stress.

A large prospective study examining motocross-related orthopaedic injuries over five years identified 615 injuries, with researchers observing a high overall injury burden and a growing need for surgical intervention over time. The findings highlight motocross as a physically demanding, high-risk sport where serious and sometimes disabling injuries occur regularly, reinforcing the importance of effective protective strategies.

Within this context, motocross knee braces and protection become less about reacting to injury and more about proactively managing risk in a sport where high loads are unavoidable.

What actually happens to the knee during jumps and turns

To better understand why MX knee protection matters, it helps to look at what the knee experiences during real riding conditions.

During jumps and landings:

• The knee absorbs high vertical impact while flexing to stabilise the body
• Off-line landings or fatigue late in a session increase joint stress
• Small errors can translate into large forces through the knee

During turns, berms and rough terrain:

• Sharp cornering exposes the knee to twisting (rotational) forces
• Sudden foot catch or traction loss can cause inward knee collapse (valgus stress)
• Ruts and whoops create repetitive micro-instability that builds over the course of a moto

These combined forces closely match the loading patterns examined in knee injury biomechanics research. Laboratory testing has shown that functional knee bracing can:

• Reduce internal knee rotation by up to ~70%
• Limit inward knee movement by around 50%
• Lower forces acting on the ACL by approximately 62–75% under combined rotational loads

Taken together, this research helps explain why structured knee support is so relevant to motocross; it’s designed to address the exact movements and forces that place the knee at greatest risk during real-world riding.

What a motocross knee brace is designed to do

A motocross knee brace helps support the knee during high-risk movements without restricting normal riding mechanics. Rather than acting as rigid armour, it functions as an external support system that helps guide the joint through demanding conditions.

In practical terms, a knee brace is intended to:

• Limit excessive joint motion that can occur during awkward landings or sudden changes in direction
• Support knee alignment when traction is lost or the foot catches unexpectedly
• Work alongside the body’s muscles, providing reinforcement when fatigue or impact reduces natural control

It’s important to be clear about what a brace does — and doesn’t — do. A motocross knee brace cannot prevent all injuries or replace strength, skill or good riding technique. Instead, its role is to reduce exposure to high-risk movement patterns, particularly those involving uncontrolled twisting or inward collapse of the knee. Used consistently, it becomes part of a broader approach to managing risk in a physically demanding sport.

Why the CTi3 brace works so well for motocross

The Össur CTi3 knee brace is designed with the realities of motocross in mind, applying proven bracing principles to the demands of high-impact, dynamic riding, giving you:

• Stability for aggressive riding

The CTi3 is engineered to support ligament stability during unpredictable movement, helping manage the forces that occur during jumps, landings and rapid direction changes without locking the knee into a fixed position.

• Lightweight performance

Weight matters in motocross, especially over long motos. A lighter brace helps reduce fatigue and allows riders to move naturally on the bike, maintaining control and responsiveness from start to finish.

• Secure, anatomical fit

An anatomically shaped design helps the brace stay aligned with the leg through repeated motion. This reduces brace migration during jumps and turns, so support remains consistent when it’s needed most.

• Lasting quality in demanding environments

Motocross places constant stress on equipment. The CTi3 is built for durability in high-impact sports settings, making it suitable for regular use in conditions where reliability matters.

Getting the most from your CTi3 knee brace

At Support Brace Australia, we understand that choosing the right brace is only part of the equation. That's why we focus on providing clear product information and practical guidance to help you make informed choices. Here's what to keep in mind when using your CTi3 brace for motocross:

Fit and adjustment

• Follow sizing guidelines carefully to ensure correct alignment through the knee joint.
• Secure straps firmly but comfortably to avoid movement without restricting circulation.

Gear integration

• Make sure the brace fits smoothly with your boots, pants and any additional guards.
• Check that nothing interferes with knee movement or causes pressure points when riding.

Break-in expectations

• Allow time for the brace to settle and adapt to your leg shape.
• Shorter initial rides can help you adjust before extended motos.

Previous knee injuries

• Riders with a history of ACL injury or surgery should consult a qualified healthcare professional before use.
• A clinician can help confirm fit and suitability for individual needs.

Make knee protection part of your riding setup

Whether you’re lining up at the gate, training through the week or riding purely for enjoyment, choosing the right motocross knee brace can help you ride with confidence and focus on what matters most: time on the bike. Ready to ride with added confidence and support? Explore the CTi3 collection at Support Brace Australia.