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Schuberth SK1 Carbon Fiber Helmet SK1 CARBON is the first Schuberth CMR helmet. SNELL FIA CMR 2016:  Carbon helmet is finished in a matte clear coat, and includes top air scoops as standard. OUR EXPERIENCE AT YOUR SUPPORT: The lightweight, hand laid carbon, and autoclave cured shell, is derived from our experience gained in Formula 1, and is specifically developed for the CMR homologation. The SK1 helmet is produced with the same technologies used for the FIA 8860-2018 models, included injection-molded 3mm FIA homologated visor with symmetrical opening and Pinlock® 120 mechanical anti-fog, ventilation system, and aramid chinstrap. EXCEPTIONAL COMFORT: SK1 benefits from all Schuberth experience in making safe and comfortable helmets. SK1 has dedicated interiors designed specifically to meet the needs of all future champions. 16 VENTILATION CHANNELS ON THE SHELL: Optimum circulation is achieved through aerodynamic design and air flow channels built into the EPS, providing the ideal flow for intake of cool air and exhaust for hot air. In open air, the helmet feeds 14 liters of fresh air per second at 100 km/h. 3 MM THICK 3D INJECTED VISOR: 19 different visors available from transparent to dark with several mirroring multi-layer mirroring coating options and the new High Contrast options. All standard visors are Pinlock® 120 lens equipped providing optimal fog resistant performace. Tear-off buttons are also installed. VISOR LOCK SYSTEM: Two-stage visor lock ensures the visor always closes symmetrically and therefore securely. Stage One lets in a small amount of air while the visor is still securely locked. Stage Two creates a firm visor seal that will keep out fine dust or water. Schuberth SP1 Carbon Fiber Helmet Available Accessories Schuberth SK1 Individual Vent Scoops Available Here Schuberth SK1 Visors Available here Schuberth SK1 Scoops Available Here

ULTRA-LIGHT CARBON FIBER KARTING HELMET Bell Racing is proud to introduce the KC7 CMR Carbon, the first ultra-lightweight carbon fiber youth karting helmet on the market.  Based on the HP7 Formula 1 helmet, this sleek, aerodynamic design features an advanced ventilation system with 14 air intake and extraction channels designed to maximize cooling and a double screen anti-fog (DSAF) insert to prevent fogging in rainy conditions. Certified to the FIA/ Snell CMR standard designed for karting drivers under the age of 18, the KC7 CMR Carbon is a winning choice for the next generation of champion drivers. Ultra-Lightweight Carbon Fiber Shell: 2.6 lbs. (sizes 52-56) or 2.7 lbs. (sizes 57-59) Innovative shell and shield design improve acoustic Comfort, Aerodynamic Performance and Energy Absorption Design based on the innovative HP7 used in F1 Advanced Ventilation System with 14 Intake and Extraction Channels Front and Side Air Intakes Available (Sold Separately) Hollow Synthetic Rubber Gasket Seal Ensuring that Air, Water and Dust Can’t Penetrate into the Helmet Multi-Piece, Multi-Density High-Impact Custom Bead Absorbing Liner for Low and High Velocity Impact Protection Aerodynamic Accessories including Chin Bar and Top Gurneys and Rear Spoiler (Sold Separately) for Improved Aero Performance and Stability at High Speeds Pro-Style, Multi Foam Density Interior with Superior Moisture Wicking Properties Comfort-Plus Karting Style Interior with Removable / Replaceable Cheek Pads SE07 2MM DSAF Shield (SV SE07 Pivot System) – Clear Shield Double Screen Anti-Fog (DSAF) Visor Insert For Improved Anti-Fog Performance Draw String Helmet Bag Included Hex Wrench Included FIA/Snell CMR2016 Homologation This helmet will ship to you with signature required for delivery.

Bell Racing Helmets GTX3 Carbon Helmet SA2020 The sleek, aerodynamic Bell Racing Helmets GTX3 Carbon Helmet SA2020 features an ultra-lightweight carbon fiber shell, a front chin-bar gurney and an integrated rear wing to provide the open-cockpit driver with improved aerodynamic performance and high-speed stability. The Bell Racing Helmets GTX3 Carbon is ideal for use in dusty, open-wheel environments with its integrated shield, double screen anti fog (DSAF) visor, rubber gasket seal, and rear-facing vents to help with air exchange and provide clear vision while racing in the elements. This stylish helmet carries Snell SA2020 approval, FIA 8859-2015 Homologation, and comes with M6 terminal hardware for your Head and Neck Restraint (HANS) device. These safety and comfort features make the Bell Racing Helmets GTX3 Carbon Helmet SA2020 is ideal for dirt track, karting, open-wheel, formula, and all types of open-compartment racing where clean, distraction-free airflow is essential for competition. Bell GTX3 Carbon Fiber Helmet Details: Manufacturer: Bell Helmets Manufacturer part no.: 1207Axx Homologation: Snell SA2020 and FIA 8859-2015 Shield: SE03 3mm DSAF Shield pivot system: SV SE03/05 Construction: high pressure-molded carbon fiber Interior: ultra-plush grey Comfort-Max FR® fabric Eye port: standard size Hardware included: M6 terminals for HANS, hex wrench Chin bar Gurney (duckbill): included Sizes: 57cm- to 61cm+ Bell GTX3 Carbon Fiber Features and Options: Sleek aerodynamic styling with integrated wing Venturi airflow system allows air exchange while preventing dust and dirt from entering the helmet Hollow synthetic rubber gasket keeps out dust, dirt, and water Multi-piece, multi-density high-impact custom bead absorbing liner for low- and high-velocity impact protection Integrated channels for optional drink tube and radio systems Pro-style, multi -foam density interior with contoured cheek pads for professional fit Double Screen Anti-Fog (DSAF) visor insert for improved anti-fog performance This helmet will ship with signature required for delivery.

 BELL RS7 K ULTRA-LIGHT CARBON FIBER KARTING HELMET The RS7K Carbon, based on the RS7C LTWT developed in collaboration with Penske Racing, is designed for the professional kart racer who knows weight and optimal performance are linked. The RS7K Carbon is the karting-only version (non-fire retardant, extra durable interior) of the LTWT series and is the lightest adult karting helmet available on the market weighing under 2.75 pounds race-ready. The helmet features a lightweight carbon shell, an innovative shell and recessed shield design to improve acoustic comfort while enhancing aerodynamic performance and energy-absorbing capabilities. The sleek, modern design incorporates an advanced ventilation system, Double Screen Anti-Fog (DSAF) shields, and a rubber gasket seal that ensures that water does not enter the eye opening in rainy conditions. Aerospace grade ultra-lightweight carbon shell Advanced multi-density, multi-piece liner to maximize energy absorption and impact performance Multi-purpose fit system that can be used with or without ear cups (ear cups included) Optical grade injection molded Double Screen Anti-Fog (DSAF) visor for anti-fog control and superior visibility Powerful and effective top and chin bar ventilation system with 14 air intake and extraction channels for maximum ventilation Shell and shield design optimized to improve aerodynamic performance, reduce internal noise, and enhance energy management capacities Rear spoilers, top gurney, and chin bar gurneys available separately Non-fireproof lining for extra durability RS7K Carbon is NOT compatible with head and neck restraint anchor systems or devices Synthetic rubber gasket seal to prevent dirt and water from entering the helmet Shield and pivot kit: SE07 3mm, SV(SE07,SE077) Homologation: Snell K2020 approved Alternative interior fabric colors: Black, Blue, Green, Red, Tan, Violet, White and Yellow (by special order) Color: Carbon Gloss Clear Sizes: 7 1/8- (57-) to 7 5/8+ (61+) This helmet will ship to you with signature required for delivery.

Bell Racing Helmets KC7-CMR "Lewis Hamilton" Karting Helmet F1 World Champion Lewis Hamilton designs special edition Bell karting helmet Bell Racing Helmets teamed up with F1 Multiple World Champion Lewis Hamilton to develop a special edition “Lewis Hamilton” KC7 CMR Karting helmet for the 2019 racing season. Lewis Hamilton worked personally with Bell’s in-house custom paint team to create a custom graphic for the KC7 CMR with the signature elements and colors of his F1 design. This special edition KC7 CMR features a multi-layer red SE07 2mm visor, clear top and side air intakes, clear rear spoiler and HP helmet bag. The KC7-CMR, an ultra-lightweight youth karting helmet, incorporates the same technology, aerospace materials and construction methods used to build the advanced Bell HP7 helmet used by Lewis Hamilton in F1 competition. The KC7-CMR's sleek, aerodynamic design features an advanced ventilation system that can be used with or without air intakes to maximize cooling and a double screen anti-fog (DSAF) visor to eliminate fogging. Homologated to the Snell/FIA CMR standard and certified for global competition, the KC7-CMR is designed to minimize weight for karting drivers under the age of 18. The Bell KC7-CMR is the perfect helmet for the next generation of champions as they start their racing career in karting. SPECIFICATIONS: Ultra lightweight helmet featuring a carbon/fiberglass shell: 2.6 lbs. in sizes 54 - 56cm and 2.7 lbs. in sizes 57 - 59cm (+/- 3%). Advanced multi-density, multi piece liner to maximize energy absorption and impact performance. Cutting-edge style based on the Bell HP7 used in F1. Graphic design created by Lewis Hamilton reflecting his F1 helmet livery. Powerful top and chin bar ventilation thanks to a total 14 air intake and extraction channels. Optimized shield design resulting in improved aerodynamic behavior and energy absorbing capacities. Multilayer red SE07 2mm visor. Clear top and side air intakes mounted on the helmet. Clear spoiler mounted on the helmet. Non-fireproof lining for extra durability. Snell-FIA CMR-2016 approved. Sizes: 54 to 59 cm. Snell-FIA CMR-2016 approved.

Bell has teamed up with the two times Formula 1 World Champion Fernando Alonso to create this KC7-CMR karting helmet in blue and yellow. Fernando worked closely with Bell's paint team to ensure the graphics and signature elements are closely matched to his own F1 helmet. This Fernando Alonso edition version includes a 2mm multi-layer clear purple visor, top and side air intakes, rear spoiler, and a Bell HP Helmet bag. That is over $300 worth of accessories included. The KC7-CMR Fernando Alonso Helmet is certified to the FIA/Snell CMR standard and designed for karting drivers under the age of 18 years of age                 Fernando Alonso's signature helmet design is a must for all Alonso fans. Top-notch accessories included and upgrades as many upgrades such as a multi-layer clear purple visor, top and side air intakes, rear spoiler, and a Bell HP helmet bag. Extremely Light Weight – 1186 grams in sizes 52 to 56 and 1230 grams in sizes 57 to 59 (+/-3%). Innovative Shell and Shield Design to improve Acoustic Comfort, Aerodynamic Performance, and Energy Absorbing Capacities. Design based on the Innovative HP7 used in F1. Lightweight Carbon Composite Shell. Advanced Ventilation System with 14 Intake and Extraction Channels. Front and Side Air Intakes are available (Sold Separately). Hollow Synthetic Rubber Gasket Seal ensures that Air, Water, and Dust Can’t Penetrate the Helmet. Multi-Piece, Multi-Density High-Impact Custom Bead Absorbing Liner for Low and High-Velocity Impact Protection. Aerodynamic Accessories including Chin Bar and Top Gurneys and Rear Spoiler (Sold Separately) for Improved Aero Performance and Stability at High Speeds. Pro-Style, Multi Foam Density Interior with Superior Moisture Wicking Properties. Comfort-Plus Karting Style Interior with Removable / Replaceable Cheek Pads. Double Screen Anti-Fog (DSAF) Visor Insert For Improved Anti-Fog Performance. DHP Helmet Bag Included. Hex Wrench Included. Homologation: Snell-FIA CMR-2016 Approved.

Bell has teamed up with Formula 1 World Champion Charles Leclerc to create this KC7-CMR karting helmet in red and white Ferrari colors. Charles worked closely with Bell's paint team to ensure the graphics and signature elements are closely matched to his own F1 helmet. This Charles Leclerc edition version includes a 2mm multi-layer clear purple visor, top and side air intakes, rear spoiler, and a Bell HP Helmet bag. That is over $300 worth of accessories included. The KC7-CMR Charles Leclerc Helmet is certified to the FIA/Snell CMR standard and designed for karting drivers under the age of 18 years of age. Helmet weights (excluding accessories): Sizes 52-56: 2lb 10oz or 1186 grams (+/-3%) Sizes 57-59: 2lb 12oz or 1230 grams (+/-3%) Charles Leclerc's signature helmet design is a must for all Leclerc fans. Top-notch accessories included and upgrades as many upgrades such as a multi-layer clear purple visor, top and side air intakes, rear spoiler, and a Bell HP helmet bag. Extremely Light Weight – 1186 grams in sizes 52 to 56 and 1230 grams in sizes 57 to 59 (+/-3%). Innovative Shell and Shield Design to improve Acoustic Comfort, Aerodynamic Performance, and Energy Absorbing Capacities. Design based on the Innovative HP7 used in F1. Lightweight Carbon Composite Shell. Advanced Ventilation System with 14 Intake and Extraction Channels. Front and Side Air Intakes are available (Sold Separately). Hollow Synthetic Rubber Gasket Seal ensures that Air, Water, and Dust Can’t Penetrate the Helmet. Multi-Piece, Multi-Density High-Impact Custom Bead Absorbing Liner for Low and High-Velocity Impact Protection. Aerodynamic Accessories including Chin Bar and Top Gurneys and Rear Spoiler (Sold Separately) for Improved Aero Performance and Stability at High Speeds. Pro-Style, Multi Foam Density Interior with Superior Moisture Wicking Properties. Comfort-Plus Karting Style Interior with Removable / Replaceable Cheek Pads. Double Screen Anti-Fog (DSAF) Visor Insert For Improved Anti-Fog Performance. DHP Helmet Bag Included. Hex Wrench Included. Homologation: Snell-FIA CMR-2016 Approved.

Bell Racing GTX.3 SA2020 Helmet With its refined, aerodynamic design and lightweight carbon composite shell, the Bell Racing Helmets GTX.3 Composite SA2020 helmet provides the best performance and pro features for open wheel, open compartment, karting, formula and dirt track racers. This Bell GTX.3 Composite SA2020 has an integrated shield and dual screen anti-fog (DSAF) visor with rear-facing vents which are ideal for these forms of racing, allowing for air exchange and unobstructed vision without worrying about dust and dirt. Bell Racing GTX.3 Auto Racing Helmet Features Snell SA2020 and FIA 8859-2015 homologation Includes clear SE03 3mm DSAF shield (SV SE03/05 pivot system) with DSAF anti-fog insert Sleek aero styling with integrated wing Front chin bar Gurney ("duckbill") improves high-speed aerodynamic performance Venturi airflow system lets fresh air in, hollow synthetic rubber gasket seal keeps dirt, water and dust out High-strength, lightweight carbon-composite construction using new high-pressure molding system Multi-piece, multi-density high-impact custom bead absorbing liner for low- and high-velocity impact protection Ultra-plush grey Comfort-Max FR® interior fabric wicks away moisture Install integrated drinking tube and radio microphone systems with the integrated face piece channels Multi-density foam interior and contoured cheek pads offer a professional fit Standard-sized eye port M6 terminal hardware and hex wrench for Head and Neck Restraint devices Additional visor shields for the Bell Racing GTX.3 available here. Add a Competition Karting Performance Racing Helmet Bag and keep your new Bell Racing GTX.3 racing helmet safe and secure throughout each race weekend.

Bell Racing Helmets KC7-CMR Champion Karting Helmet The Bell KC7-CMR is a karting specific helmet based on the same design as the top of the range HP7 carbon helmet, as used by some F1 drivers. Constructed using an ultra lightweight Carbon/Kevlar/Glass hand laminated shell with a 2mm double screen anti fog visor for perfect visibility in all conditions. Ultra lightweight and strong carbon/kevlar/fibreglass composite shell Striking Champion pink graphic design is sure to get you noticed Anti fog visor provides excellent visibility 14 air intakes and extraction channels provide optimum airflow through the helmet A range of spoilers and air intakes are available separately The shell of the KC7-CMR is designed to provide the optimum visor location which improves aerodynamics and reduces noise. The powerful top and chin bar ventilation keeps the drivers head cool thanks to a total of no less than 14 air intakes and extraction channels. A range of accessories including different visor options, spoilers and air intakes are available separately. Helmet weights - Sizes 54-56cm - 1185g ( /-3%) Sizes 57-59cm - 1230g ( /-3%) Snell-FIA CMR-2016 approved

AiM Sports MyChron5S 2T Dual-Temp Digital Datalogging Dash For Kart Racing Data acquisition for karts enters a totally new dimension: MyChron 5S 2T. Besides sampling all your kart data, MyChron5S 2T features all the advantages of GPS timing and tracking, dual-temperature inputs, plus a lot of new functions designed to provide more complete and reliable information both during and after each race: Lap and split times Speed RPM Combine EGT with either CHT or H2O temps Track Position Acceleration Much more! MyChron5S 2T has been designed to provide both basic info (for new racers) and the most sophisticated data to karting professionals. Fully configurable layout lets you customize the data, color, LED indicators, etc. to suit your individual needs. The MyChron 5S 2T comes with a Y-Cable for temperature sensors, an EGT thermocouple, and your choice of either a CHT (cylinder head temp) or H2O (water jacket) thermocouple. Using a two-satellite sensor, the MyChron 5S 2T provides super-accurate GPS data for lap/split times, position, speed, etc. We have a huge track database for easy download of detailed track info. For ten years, the MyChron4 was the benchmark gauge in karting data acquisition. AiM re-establishes the benchmark with the MyChron 5S 2T -- a leap ahead of the 4 (and all its imitators). At the same time, the MyChron5 2T is fully compatible with all MyChron4 peripherals, as well as a Lambda controller, Data Hub, MyChron Expansion, and SmartyCam. FEATURES: Automatic Start Rechargeable Li-Ion battery lasts up to 10 hours 1 MB memory for over 3 hours of data logging Two Temperature channels Seven fully-configurable LEDs (alarm, shift, etc.) LCD screen with configurable color Wireless data download via secure Wi-Fi connection Intuitive menu design for easy configuration Call us with any questions you have about the incredible MyChron5S 2T from AiM!

Arai SK-6 Adult Karting Helmet Being the dominant helmet on the F1 grid, winning an IRL Championship, and protecting the heads of NASCAR heroes like Gordon, Burton, and Montoya has put Arai on the receiving end of an abundance of world-class racing helmet input. The SK-6 gets the benefits of all this input. Designed by Arai specifically for karting, the SK-6 adds a ton of features and advancements to the already-impressive list of its predecessor. You won’t believe the comfort, lightness, and feeling of confidence the SK-6 gives you, thanks to its incredibly strong, proprietary cLc (Complex Laminate Construction) shell. Its strength allowed Arai to give the SK-6 an extremely soft EPS liner for better comfort and impact energy management. If you’re serious about taking your karting to the next level, choose the helmet that’s already there. Snell K2015 certified. SK-6 FEATURES Positive shield lock mechanism provides Solid latching, while allowing normal operation of the shield. Designed to be an integral component of the shield system and function, not just an add-on afterthought. The simplicity of the function masks the complexity of the design. A feature taken directly from the new GP-6PED New shield pivot hardware improves aerodynamics. Type "6" 3mm shield. Wider eye port for increased peripheral field of view. Larger intake vent toggles for easier operation. Large rear vents for improved ventilation. Features taken directly from the new GP-6PED. New "Removable/Replaceable" cheek pad design allows for custom fitting with optional thicknesses (15mm, 20mm, 25mm, 30mm). Cheek pad covers are also removable to allow for easier and more thorough cleaning. Newly sculpted chin bar and ridge along lower edge of shell to improve structural integrity. Provides a stronger shell near the opening where it is needed as well as lowers the Center of Gravity. Rise in shell above the shoulders for added clearance. An effective helmet is one that fits properly. Have an assistant use a measuring tape or a piece of string to measure the circumference of your head, starting at a point approximately one inch above the eyebrows in front, around a point in the back of the head that results in the largest possible measurement, and finally wrapping back to the front. It's a good idea to take several measurements and use the largest one.

STILO ST5 KRT KARTING HELMET SK2020 The Stilo ST5 KRT (Kart) Helmet turn heads with style that closely resembles the top of the range ST5 Zero helmet used by many professional racing athletes worldwide. The ST5 Kart is manufactured in a lightweight and very strong composite material and is currently available in white. As with every Stilo helmet, the focus is on safety, comfort and function. The ST5 Kart helmet’s interior has an excellent fit and comfort level due to its dual density interior foam lining. From the first use, karters will truly appreciate the level of comfort it offers. The ST5 Kart's symmetrical visor offers excellent vision and an effortless central visor locking system that karters will appreciate. The centrally located locking system has dual opening positions allowing adjustment for the visor to be slightly open for extra airflow as preferred by some karters in damp conditions or left completely sealed, but more importantly in both of these positions the visor is locked and will never fly open. The Stilo ST5 Kart Helmet arrives with a 3mm thick FIA F1 standard visor - adding a dramatic improvement in safety. Offered in a large range of different finishes and tints, including colored iridium options that have been added for a totally bespoke finish. In addition a double glazed option is available for racing in wet and cold conditions to prevent misting up. EPS cheek pads provide the best in lateral crash safety, while retaining the functionality of the earmuffs to provide a comfortable aural environment for communication.  Available in gloss white exterior finish, the ST5 Kart is homologated to the Snell K 2020 standard.

Stilo Carbon Curva 8870 Rib Protector Homologated by the FIA World Motor Sport Council and developed by Stilo, the new Stilo Carbon Curva 8870 Karting Body Protection features ‘Carbon Curva’ technology patented by the Italian manufacturer, which allowed the fusion of protective carbon and flexible carbon adding top functionality to a device designed to protect the driver's chest and rib, crucial body areas in karting. The drivers wear it under their CIK-FIA-approved overalls, remaining free to move their arms, neck, and head, as it perfectly fits the body. Mandatory in FIA Karting Championships, Cups, and Trophies from the 2021 season, the FIA 8870-2018 Standard for Karting Body Protection (KBP) is extremely light and comfortable. A combination that provides superior protection to kids and adults within an all-in-one device. Designed to withstand 60J of energy to the chest and 100J of energy to the ribs, the FIA KBP standard prevents injuries from impacts with flat or curved structures, the steering wheel or edge of the seat, and the steering column.

AiM Sports MyChron5S Digital Datalogging Dash For Kart Racing Data acquisition for karts enters a totally new dimension: the AiM MyChron5S. Besides sampling all your kart data, MyChron5S features all the advantages of GPS timing and tracking, plus a lot of new functions designed to provide more complete and reliable information both during and after each race: Lap and split times Speed RPM Head, H2O, or Exhaust Temperature (or two temps with 2T!) Track Position Acceleration Much more! MyChron5S has been designed to provide both basic info (for new racers) and the most sophisticated data to karting professionals. Fully configurable layout lets you customize the data, color, LED indicators, etc. to suit your individual needs. Plus, the MyChron5S 2T adds sampling of a second temperature to the basic MyChron5S. Using a two-satellite sensor, the MyChron5 provides super-accurate GPS data for lap/split times, position, speed, etc. We have a huge track database for easy download of detailed track info. For ten years, the MyChron4 was the benchmark gauge in karting data acquisition. AiM re-establishes the benchmark with the MyChron5S -- a leap ahead of the 4 (all its imitators). At the same time, the MyChron5 is fully compatible with all MyChron4 peripherals, as well as a Lambda controller, Data Hub, MyChron Expansion, and SmartyCam. Features include: Automatic Start Rechargeable Li-Ion battery lasts up to 10 hours 1 MB memory for over 3 hours of data logging One Temperature channel (two on the 2T; both include thermocouple) Seven fully-configurable LEDs (alarm, shift, etc.) LCD screen with configurable color Wireless data download via secure Wi-Fi connection Intuitive menu design for easy configuration Call us with any questions you have about the incredible new MyChron5S from AiM Sports! * Configurable as Shift Lights or RPM/Lap Times Alert

Arai CK-6 Youth Karting Helmet The Arai CK-6 is designed specifically for junior kart racers who are too small to comfortably fit and/or support the weight of an adult model SK-6 karting helmet. Meets the SNELL/FIA CMR standard for junior karting CK-6 FEATURES SRC Superior Resin shell material, developed and formulated in-house at Arai, dramatically improves the bonding properties of standard fibers, allowing the use of less material for reduced weight and lower cost. Removable/Replaceable cheek pads in optional sizes allow for custom fit when needed. Easily removable 5mm top layer of foam allows for further custom fitting. Wide and tall eye port for an exceptional field of view. Large intake vent toggles for easy operation, with large rear vents for improved ventilation. Features taken directly from the GP-6PED auto-racing helmet. Newly sculpted chin bar and ridge along lower edge of shell to improve structural integrity. Provides a stronger shell near the opening where it's needed while lowering the center of gravity. Rise in shell above the shoulders for added clearance. SPECIAL YOUTH SIZING XXS: 50-51cm XS:   52-53cm S:     54-56cm M:    57-58cm L:     59cm An effective helmet is one that fits properly. Have an assistant use a measuring tape, or a piece of string to measure the circumference of your head starting at a point approximately one inch above the eyebrows in front, around a point in the back of the head that results in the largest possible measurement, and finally wrapping back to the front. It is a good idea to take several measurements to make sure you have the largest one.