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Leatt DBX 5.5 Neck Brace for MTB, BMX

Size Guide

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our part num: B-1014030020

Distinguishing Features

  • More Adjustable than the DBX 4.5, and much less expensive than the DBX 6.5. The DBX 5.5 is Leatt's sweet spot and best selling DH/BMX brace.
  • Discounted 2016 Models sold exclusively at SportsProtective!
  • Alternative Load Path Technology  - Helps mitigate impact on neck/spine during a crash
  • Helmet Rim Striking Platform Profile - For a biomedical balanced head and helmet freedom of motion
  • Discounted 2016 and regular price 2017 neck braces offer identical brace functionality. The only difference is new graphic treatments for 2017. For a limited time, save over $150 with 2016 model, but supplies are limited!


  • Frame - fiberglass reinforced polyamide chassis, rigid design by Leatt to improve durability
  • Chest Supports - cutout split design with dual removable rubber pads, increased comfort, range of motion and adjustability to meet neck height. 
  • Thoracic Spine Protection - split designed coreflex thoracic rear strut and tough rubber insert, for protection while designed to snap off with severe impact to prevent back injury; replaceable
  • Chest Straps - included, more secure fit
  • Adjustability - Five-way adjustability including sliding front and rear SureFit adjusters and three angle rear thoracic strut adjustments, ensures optimum fit to most body types
  • Padding - injected easy-to-clean foam padding with additional removable shoulder and chest pads, increased comfort and extra crash impact protection 
  • Ventilation - Airflow ribs throughout for increased ventilation, keeps rider cool
  • Crumple Zones: strategically placed fracture points engineered to react to severe impact, increased rider safety
  • Range of Motion - front, side tables sit lower than previous models, more flexibility and increased trail visibility
  • Body Armor Compatibility - perfect fit with any Leatt Upper Body Armor; compatible with other types of upper body armor
  • Weight - 700 grams (S/M), 840 grams (LG/XLG)
  • Suitable for downhill mountain bike, freeride, and BMX racing ONLY (must wear a full face helmet)


The Leatt DBX 5.5 MTB Neck Brace's Ease of Use sets it Apart

Years of work, research and innovation has made Leatt the most trusted manufacturer of downhill mountain bike and BMX protective gear. The Leatt neck brace is the product that stands out amongst their entire line. We believe that the 5.5 neck brace is truly the most technologically advanced neck brace you can buy and the benefits far outweigh the cost. The CE certified 5.5 neck brace balances the needs of comfort, efficiency, and protection by allowing greater freedom of movement while having increased adjustability, assuring a great fit. 

Alternative Load Path Technology - What separates Leatt from their competitors? Simply put, it's Leatt's patented Alternative Load Path Technology. Used on all Leatt neck braces, Alternative Load Path Technology spares your neck and back from absorbing all the energy of a blow. Instead, the neck brace intercepts the impact from the skull by dispersing the force, thus sparing you from a more serious, potentially season-ending neck injury. Working in conjunction with a full face helmet, the neck brace guards against extreme backward-bending of the head (hyper-extension); extreme forward bending of the head (hyperflexion); and over-bending of the head to either side (lateral hyperflexion). Additionally, the neck brace is protective when the chin bar takes the brunt of a face plant and pushes the neck backward (posterior hypertranslation). In certain scenarios, the neck brace can prevent axial loading.

Fit and Adjustability - The Leatt 5.5 has increased ease of use compared to the lesser priced 4.5 model. It allows for faster, toolless adjustability to ensure the right fit. While the 4.5 uses an Allen wrench to add and remove different sized spacers, the 5.5 has a much faster and efficient sliding front and rear SureFit adjusters. The adjustment latch snaps into place and can be resized in seconds. The FlexCore thoracic strut has 0,5,10 and 15-degree adjustable rubber spacers to allow for a more precise fit to the rider's back. We love how easy the 5.5 is to adjust and fit when compared to the 4.5. While there is a difference in cost, the difference in ease of use makes the Leatt 5.5 worth its price point. 

About Leatt

Sometimes it takes a tragedy to create a change. Such was the case in South Africa in 2001 when Dr. Chris Leatt, a medical doctor and motorcycle rider, went to a racetrack with his son who himself had just begun to ride. There, Dr. Leatt witnessed the death of another rider, Alan Selby, from suspected neck injuries. Dr. Leatt was so shaken by the incident that he made it his mission to develop a device that would go a substantial way toward preventing this type of fatal injury in the future. After three years of research, development, and testing, Dr. Leatt introduced his first Leatt-Brace. However, it would be another two years before the Leatt-Brace would make it to market on a large scale. Today, Leatt-Brace is a worldwide leader in neck protection for extreme sports. Dr. Leatt likes to say the Leatt Brace is "a helmet for your neck". Designers and engineers in the Leatt laboratory in South Africa have expanded their reach to high-technology protective armor that meet varying needs of downhill mountain bikers, bmx bikers, and skiers and snowboarders.


Leatt Size Chart

Leatt Neck Brace, Body Armor, and Pads Size Charts

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Leatt Neck Brace Size Charts - Look for the Specific Brace Model Below

Leatt DBX 5.5  and DBX 5.5 Jr Neck Braces

Neck Brace Size Chest Circumference
Junior 29.5-32.5in
Adult S/M 32.5-37.0in
Adult L/XL 37.0-49.5in


Leatt DBX 4.5 Neck Brace

Neck Brace Size Chest Circumference
Adult S/M 31.0-37.0in
Adult L/XL 37.0-45.0in


Leatt DBX Comp 4 and DBX Ride 4 Neck Braces

Neck Brace Size Chest Circumference
Adult S/M 26.0-37.0in
Adult L/XL 34.0-43.0in


Leatt Upper Body Armor Size Charts

Leatt 3DF Adult Size Upper Body Armor

Size Chest Circumference
Small/Medium 34-38in
Large/Extra Large 40-44in
XXL 44-48in


Leatt 3DF Youth Size Upper Body Armor

Size Height
Junior Small/Medium 4'5"-4'9" Tall
Junior Large/Extra Large 4'9"-5'3" Tall


Leatt 3DF Knee Guards Size Charts

Measure your knee circumference, with your leg extended out straight.

How to Measure Your Knee for Leatt 3DF Knee Pads

Leatt 3DF Adult Size Knee Guards

Size Knee Circumference
Small/Medium 31-41cm
Large/Extra Large 41-53cm
XXL 53-58cm


Leatt 3DF Youth Size Knee Guards

Size Knee Circumference
Junior 4'5"-4'9" Tall
Kids 4'9"-5'3" Tall


Leatt 3DF Elbow Guards Size Charts

Measure your elbow circumference, with your arm extended.

How to Measure Your Elbows for Leatt 3DF Elbow Guards

Leatt 3DF Adult Size Elbow Guards

Size Elbow Circumference
Small/Medium 22-28cm
Large/Extra Large 28-35cm
XXL 35-41cm


Leatt 3DF Youth Size Elbow Guards

Size Elbow Circumference
Junior 4'5"-4'9" Tall
Kids 4'9"-5'3" Tall


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