O5 Carbon Open Face Helmet

A helmet only protects you properly when it fits. Take two minutes to measure before you order.

How to measure your head

Use a soft measuring tape. No tape? Use a piece of string, then measure the string with a ruler.
Wrap it around the widest part of your head, about one inch above your eyebrows and just above your ears.
Keep the tape level all the way round and comfortably snug.
Measure two or three times and use the largest reading.

Match your measurement to the chart

Sizing differs between helmet models, so always use the size chart shown on the product page of the helmet you want. Don't assume your size in one helmet is your size in another.

How a helmet should feel

Snug all the way around, with the cheek pads touching your cheeks.
No pressure points or hot spots on your forehead.
With the strap fastened, the helmet should not roll forward off your head or twist freely side to side.
New helmets loosen slightly as the padding beds in, so a firm fit is normal.

Between two sizes?

Email contact@ridercape.com with your measurement and the helmet you're looking at, and we'll help you choose.

Gloves, jackets and boots

For riding gear, use the size information on each product page and compare it with your own measurements.

If the fit isn't right when it arrives, see our Refund Policy.

Built for your next ride

Description

The O5 Carbon is a DOT certified carbon fiber open face helmet with an extended full shield visor and a drop-down sun visor. It is built for daily riding, cruising and long summer days when you want an open feel and low weight without giving up face coverage. An optional Bluetooth intercom lets you add group comms from the start.

Key features

Carbon fiber shell: 3K / 12K carbon fiber gives high impact resistance at reduced weight, which means less neck fatigue.
Extended full shield visor: open face comfort with more face coverage and a large field of view.
Dual visor system: clear outer visor plus built-in sun visor.
Airflow system: adjustable top air intake and rear exhaust vent reduce wind resistance and heat buildup.
Comfort liner: removable, washable inner liner in breathable, sweat-resistant materials, shaped for a snug, pressure-free fit.

Optional intercom

Bluetooth headset for music, phone calls and GPS directions
2-8 rider intercom with a range of up to 500 m
Noise-reduction microphone to filter wind
One-touch controls on the side of the helmet

Specifications

Shell: 3K / 12K carbon fiber
Certification: DOT
Visors: extended outer shield plus internal sun visor
Liner: removable and washable

Sizing

Sizes M, L, XL and XXL; see the size chart below. Measure your head circumference just above your eyebrows. If you are between sizes, the larger size is recommended for a more comfortable fit.

Choose a 3K Grain, 12K Grain or Forged Carbon finish in matte or gloss black, with a Clear, Tinted Black or Red visor, and order it with or without the intercom.

Size	CM	Inches
M	56–57 cm	22.0–22.4 in
L	58–59 cm	22.8–23.2 in
XL	60–61 cm	23.6–24.0 in
XXL	62–63 cm	24.4–24.8 in

Find your fit.

A great ride starts with the right fit. Measure your head before you pick a size.

Wrap a soft measuring tape around your head, just above your eyebrows and ears.

Keep the tape level and comfortably snug, then read your head circumference.

Match your measurement to the size chart for this helmet in the description above.

Between two sizes? A helmet should feel snug without pressure points. Not sure? Email contact@ridercape.com before you order.

Frequently asked questions

How do I choose the right helmet size?

Measure your head circumference just above the eyebrows and ears, then compare it with the size chart in the product description. Sizing can differ between helmet models, so check the chart for this one.

Is this helmet safety certified?

Where a helmet carries a certification such as DOT or ECE, it is listed in the product description. If you can't find it there, email us before ordering and we'll confirm.

How much is shipping?

Shipping is calculated at checkout and shown before you pay, so there are no surprises.

Which options come with my order?

You receive exactly the variant you select above — colour, size and any other option shown. Double-check your selection before adding to cart.

How do I contact support?

Email contact@ridercape.com with your question or order number and we'll get back to you.