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Size Guide


Weight (g): Approx.290g

Type8: Ultralight helmet

Type7: Aerodynamics Helmet

Type6: Road bike helmet

Type5: TT bike Helmet

Type4: aero Helmet

Type3: Bicycle speed areo Helmet

Type: Integrally-molded Helmet

Style: Aerodynamic Road/Mountain/TT/Track Helmet

Standard: CPSC

Sport Type: Helmet cycling ,Capacete Bike ,Bicicleta Helmet

Size: 55-61CM

Model Number: N-CAIRBULL-06

Material: PC+EPS+inner pad

Material: EPS

Features: Ultralight,Integrally Molded,breathable

Color: black,black red,black,white,white

Certification: ce

Brand Name: CAIRBULL

Please note that the helmet is a free size, suitable for a head circumference of 55-61cm.


Size: 55-61cm

Weight: about 290g

Material: PC+EPS+Inner pad


1 Compatible for road bike,for man and women. past the safety test

3.the EPS foam was thickened.


It has the good ventilate function with air holes,and good protective performance cause it was specially designed for the endurance racing athlete.

The inner EPS shock-release system was put in.and we used the aramid filament to enhance the strength.

Quality & Certification

①Original CAIRBULL products, and we have a product authorization.

②This CAIRBULL helmet has passed the CE/CPSC Test and has reliable safety performance


Head size measurement

1.For the first time, a soft ruler was used to wrap the hair root around the forehead to 2cm below the occipital bone.

2.The second time, use a tape measure to wrap around the brow bone to the occipital bone.Road&Mountain High Quality Bicycle Helmnt

Suitable for adult men and women01.Integrated Design

The helmet is formed by one-time injection molding to reduce the splicing of modules and greatly increase the strength of the helmet to protect the safety of the rider.02.Light design

Lightweight design, the weight of the helmet is about 267g, so you won't feel tired.03.Adjustable Nylon Strap

Adjustable straps, you can adjust the tightness of the straps

according to the shape of your head for comfort.

Left picture:Plastic Clip Buckle/middle picture:Plastic Clip Buckle/Right picture:Comfortable Chin pad04.Ventilation & Breathable

Actively ushers cool air over the head and regulates temperature by drawing cool air into the intake ports and circulating it through a matrix of air channels. 11 Big vents provide improved airflow and reduced weight05.Integrally-Molded Process and High Quality Material

Outer Shell Construction:In-mold polycarbonate shell with EPS liner

Inner Shell:Thermoformed reinforcement shock absorbing polystyrene

Left picture:PC/Right picture:EPS06.Safety First

1.Wraparound Protection

2.All Mountain helmet with extended coverage on back of head for improving protection by more than 30%07.Removable Lining

Clean tex pads are treated antibacterially.It can prevent the rise of bacteria in the helmet chinpad optimal wearing comfortable

Lining material:Cotton and foam08.Adjustable Size

Super and Comfort Fit with an easy-to-turn rubber overmolded dial for adjustments.

clockwise rotation/Anticlockwise rotation

Regulator material:PP

Suitable:Adult M/L

Adjustable Range:0~4.4cm

Applicable Head Circumference:55~61cm09.Reduce windage

According to the principle of aerodynamics, the streamlined style design reduces air resistance during riding and improves riding comfort.10.Product details & size

01.Nylon Clip Buckle:Magic buckle chin pad, built-in rubber ring, effectively fix the strap and prevent it from falling off.

02.Clean Tex Pads:There are multiple Velcro stickers on the EPS, which effectively fix the inner lining and make it immobile.

03.Triple Height Adjustment:Triple Height Adjustment, divided into 3 levels (upper, middle and lower), as shown below.

04.Size:About 28cm*15cm*22cm


SMALL:21-22in,54-57cm Hat size: 6. 3/4 -7. 1/8

MEDIUM:22-23in,57-59cm Hat size: 7. 1/8 -7. 3/8

LARGE:23-24in,59-62cm Hat size: 7. 3/8 -7. 3/4

①FIND A MEASURING TOOL:Find a flexible measuring tape or a phone charger

(and ruler to measure it against).

②MEASURE:Wrap the cord around your head just above

the eyebrows.

③FIND YOUR SIZE:Use the chart above to find your size. If you're

in-between sizes, size down.How to wear helmet?11.Multicolor Options

A variety of colors can be selected, you can choose according to your needs, there is always one suitable for you.