CTi®3 MX (Motocross) Kit
The CTi®3 MX Kit is an accessory bundle for the CTi®3 knee brace to get you started with
motocross or other extreme sports. It contains an Impact Guard and installation hardware, Sleeve with Mesh undersleeve, brace bag, and sticker sheet to show your CTi® pride.
Includes:
- CTi®3 Impact Guard
- Sleeve with Mesh
- CTi® Decal Sheet
- CTi® Product Bag
*Only compatible with the CTi®3 knee brace
CTi®3 Size Guide
Find Your CTi®3 Size
Measure your leg, enter your measurements below, and our CTi®3 Size Finder will compare them with the sizing ranges to identify your closest match.
CTi®3 Size Finder
Enter your measurements below. Use inches only.
How to Measure
Use the three quick visuals below, then enter your measurements into the size finder above.
Knee Width
Measure straight across the center of the knee. This is the primary measurement used to determine CTi®3 size.
Thigh Circumference
Measure around the thigh 8 inches above the center of the kneecap.
Distal Patella
Measure around the leg at the distal-patella point below the knee.
CTi®3 Size Chart
All measurements below are in inches.
| Size | Knee Width | Thigh Circumference | Distal Patella |
|---|---|---|---|
| Small (S) | 3.5" – 4" | 15.7" – 18.5" | 11" – 13.4" |
| Medium (M) | 3.9" – 4.5" | 17.7" – 21.7" | 13.4" – 15" |
| Large (L) | 4.4" – 5" | 20.5" – 24" | 15" – 16.1" |
| X-Large (XL) | 4.9" – 5.5" | 22.8" – 26.4" | 16.1" – 17.3" |
Between Two Sizes?
Use knee width as the primary sizing measurement. Then compare thigh circumference and distal-patella circumference. If your measurements point toward different sizes, contact our CTi Sports Bracing Fit Specialists before ordering.
Helpful CTi®3 Videos
Quick videos covering the brace, measurement process, and strap adjustment.
CTi®3 Overview
A quick look at the CTi®3 brace and fit.
How to Measure
See how the CTi®3 sizing measurements are taken.
CTi®3 Strapping Tips
Properly secure and adjust your CTi®3 straps.
Found Your CTi®3 Size?
Choose your recommended size and select the correct left or right brace. If your measurements don't clearly match one size, contact us before ordering.
Shop Össur CTi®3The CTi®3 combines lightweight support with a design made for active movement.
Support That Moves With You
The Össur CTi®3 Knee Brace combines a lightweight, rigid frame with anatomically designed hinges to provide functional ligament support and controlled movement during active use.
Precision Hinge
Dual‑pivot hinge follows natural knee motion, supporting ACL, MCL, LCL, and PCL without restricting movement.
Adjustable Straps
Customizable strap system locks the brace securely in place for a personalized, no‑slip fit through every ride.
Carbon Fiber Strength
Lightweight, rigid carbon composite frame engineered for superior stability and high‑impact performance.
Support for Every Move
The Össur CTi®3 Knee Brace combines a lightweight carbon composite frame, anatomically designed hinges, and adjustable components to provide functional support during active use.
Premium Recovery Supplies
We offer premium CTi knee bracing and performance support gear trusted by professional athletes - engineered for high‑impact sports with pro‑grade protection, lightweight carbon frames, and precision fit.
Free Shipping
That's right! Free shipping on every order from our orthopedic store, no matter the amount.
Authorized Retailer
Which includes Manufacturer Warranty on many orthopedic care products.
Low Price Guaranteed
Put money back in your pocket with our industry leading low prices
Flexible Payments
HSA/FSA and interest free payment plans available.
Hassle-Free Returns
30-day return window from the date of purchase.
Frequently Asked Questions
Please read our frequently asked questions to find out more.
What makes CTi®3 different from other knee braces?
The Össur CTi®3 Knee Brace features a lightweight carbon composite frame and anatomically designed Accutrac® hinges. Its adjustable straps, flexible cuffs, and circumferential padding are designed to provide a secure fit while supporting controlled knee movement.
Who can benefit from wearing a CTi®3 Knee Brace?
The CTi®3 is designed to provide functional support for individuals with ACL, PCL, MCL, and LCL ligament injuries or instabilities. If you are using a knee brace for an injury, rehabilitation, or medical condition, consult your healthcare professional for guidance on appropriate use.
Can I wear the CTi®3 during competition?
Absolutely. CTi®3 is competition‑ready - designed for mobility and certified safe for use in most professional and amateur sporting events.
How do I find the right size?
For CTi®3 sizing, knee width is the primary measurement. Measure the width of the knee according to the CTi®3 sizing instructions.
What is the warranty and return policy?
CTi®3 includes a limited manufacturer warranty covering defects in materials and workmanship. Returns are accepted within 30 days in original condition.
