SKU: F01009400-110-001

Altitude 2.0 Helmet

Name: Altitude 2.0 Helmet
Brand: 509
SKU: F01009400-110-001
Price: 319.95 USD
Availability: InStock

$319.95 USD

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3 Year Warranty

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Reinvented to ride even harder, the second generation of the bestselling 509 Altitude series unleashes a whole new animal. Lighter, stronger, and even more comfortable thanks to a new hand lay-up fiberglass construction, the 509 Altitude 2.0 Helmet excels in any terrain or condition. Includes the Fidlock® magnetic strap buckle for easy one-handed operation, plus customizable features like a removable Pro-Series Breathbox to get you through a full season of extremes.

Key Features

Hand Lay-up Fiberglass Shell
Upper vents with on/off shutter closure for airflow control
Nine intake vents and four exhaust vents for optimal airflow
Fidlock® The Fidlock System is a cutting-edge magnetic chinstrap buckle used in motorsport helmets ensuring quick, secure, closures with one hand and is DOT and ECE compliant.
chinstrap strap closure for easy in and out
Moisture wicking removable Liner & Cheek pads for custom fit adjustments and easy to wash → Shop Cheek Pad for Altitude 2.0 Helmet
One piece eye port trim
Pro-Series Breathbox for complete protection, removable for great air flow
Universal camera mount capable
Nutsert attachment points for accessories (sides of helmet)
Adjustable polycarbonate visor
WARNING for California Residents

Specs

Helmet Certification: DOT
Starting Weight:1150 grams
Best Head Shape: Intermediate oval fit
Size Range: XS - 4X
Shell Breaks:
Small Shell - XS, SM
Medium Shell - MD, LG, XL
2X Shell - 2X, 3X, 4X
Included items: 509 helmet drawstring bag, Pro-Series breathbox, 509 Sticker

You're going to LOVE the fit. Try it on and experience our perfect fit. If you don't love it, send it back in new and unused condition within 30 days for an exchange or full refund*. Risk free.

Not sure about your size? Try on at your local dealer!

*Street Helmets are a tighter fit due to cheekpad compression, however, they do pack out over time/use.

How to Measure

When measuring your head, use a cloth tape. Start it just above your eyebrows and circle it around the thickest point in the rear of your head and then reference the size guide below.

Scroll to the right to see more sizes

Size	US Hat Size	Inches	Centimeters
X-Small	6 5/8 - 6 3/4	20 7/8 - 21 1/8	53 - 54
Small	6 7/8 - 7	21 5/8 - 21 7/8	55 - 56
Medium	7 1/8 - 7 1/4	22 1/2 - 22 5/8	57 - 58
Large	7 3/8 - 7 1/2	23 1/4 - 23 1/2	59 - 60
X-Large	7 5/8 - 7 3/4	24 - 24 1/4	61 - 62
2X-Large	8	24 3/4 - 25	63 - 64
3X-Large	8 3/4	25 1/4 - 25 3/4	64 - 65
4X-Large	9	26 - 26 1/4	66 - 67
Youth Small	6	18 1/8 - 18 7/8	47 - 48
Youth Medium	6 1/8 - 6 1/4	19 1/4 - 19 5/8	49 - 50
Youth Large	6 3/8 - 6 1/2	20 - 20 1/2	51 - 52

Pressure Points

When trying on a helmet, take note of any pressure points on your forehead—a sign that the helmet is too round. Pressure points on the sides of your head indicate a helmet is too oval for the shape of your head. After you buy a new helmet, try wearing it for 30 to 45 minutes to check for pressure points before using it on a ride.

Pressure Points

When trying on a helmet, take note of any pressure points on your forehead—a sign that the helmet is too round. Pressure points on the sides of your head indicate a helmet is too oval for the shape of your head. After you buy a new helmet, try wearing it for 30 to 45 minutes to check for pressure points before using it on a ride.

Visor for Altitude 2.0 Helmet

Starting at $12.95

VEES Protection System for Altitude 2.0 Helmet

Starting at $19.95

Visor Screw Kit for Altitude 2.0 Helmet

Starting at $9.95

Pro Series Breath Box for Altitude 2.0 Helmet

Starting at $19.95

Pro Helmet Bag

Starting at $39.95

Atmosphere Helmet

Most Affordable

DOT & ECE 22.06 certified

Starting Weight: 1,250 grams

Secure double D-ring closure

Shell venting ports

.

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Tactical 2.0 Helmets

On Sale!

DOT & ECE 22.05 Certified

Polycarbonate blend for stiffness and absorption

Starting Weight: DOT/ECE starting at 1300 grams

Optional Fidlock® magnetic chinstrap Variants

Venturi Venting

Youth Sizes Available

.

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Tactical 3.1 Helmets

Cardo UCS Module Compatibility

Trail and Mountain Variants available

DOT and ECE 22.06 certified

Poly and ABS Polymer Construction

Starting Weight: 1,300 grams

Fidlock® magnetic chinstrap

Venturi Venting

Youth Sizes Available

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Altitude 2.0 Helmet

More Style and Color Options

DOT & ECE 22.05 Certified

Hand Lay-Up Fiberglass Composite

Starting Weight: 1200 Grams

Fidlock® magnetic chinstrap

Upper vents with on/off shutter closure

Removable Pro-Series Breathbox

.

Shop Now

The Fidlock System is a cutting-edge magnetic buckle used in helmets for different biking activities, including snowmobiling, dirt biking, and street biking. Unlike the traditional double D ring closure, the Fidlock System employs a magnetic mechanism, allowing riders to effortlessly secure their helmets with one hand, even while wearing gloves.

Quick and Secure Closure:

Whether tearing through snowy trails on a snowmobile, maneuvering challenging dirt bike tracks, or cruising on city streets, the Fidlock System's magnetic buckle allows riders to quickly and securely close their helmets, even while wearing gloves.

Time-Saving Convenience:

The Fidlock System's effortless one-handed closure and release save valuable time, ensuring bikers can hit the road or trail promptly and enjoy more riding time.

Enhanced Safety:

DOT and ECE compliance guarantee that the Fidlock System-equipped helmets provide top-notch safety, protecting bikers from potential impacts and hazards unique to each activity.

Reliable Performance:

The replaceable male magnetic end ensures the Fidlock System maintains its integrity and dependability over time, offering consistent performance during numerous biking adventures.

Overall rating: 4.75 / 5 from 156 reviews.

AI Generated Review Summary

The Altitude 2.0 Helmet is praised for its lightweight and comfortable design, stylish appearance, vibrant colors, and perfect fit. Customers appreciate its ease of use with the Fidlock® magnetic strap buckle and customizable features.

Summary topics

Weight: 6%
Altitude 2.0 Design: 6%
Appearance: 10%
Color Options: 7%
Fit: 20%

Review topics: ["fit","strap","weight","issues","quality","looks","shipping","price","color","design","style","works","customer service","helmet","vents","goggles","altitude 2.0","light","buy","vision","fidlock","gear","seal","brand"].

Review highlights

"Awesome design and colors, and the adjustable vents are perfect for staying comfortable in all conditions" — Luke K.
"Looks amazing and and fits great" — Gary F.
"Very happy with my new altitude 2.0, fits perfectly and is very light." — Connor F.

Reviews

Love it!

"First off it’s beautifully colored and light weight. I should have went down a size after using their measurements compared to a shop that had your products. I’d say it fits true to size but it is bigger than other styles"

— Christina V. (5/5)

Super comfortable, lightweight, can not

"Super comfortable, lightweight, can not say more on how much i love this helmet."

— Chase M. (5/5)

Altitude helmet

"The chin guard pops out when removing helmet at times Awesome chin strap quick release design. Wish it had some reflective paint/strip on the back for night visibility. Plenty of color schemes"

— Marc G. (4/5)

best helmet ever

"great fit and the ventilation is fantastic ,realy great choice I made"

— Christian B. (5/5)

Great helmet

"Sizing was true to measurements. Lightweight. Comfortable helemet"

— Andrew B. (5/5)

Great helmet overall, would reccomend.

"The 509 Altitude 2. 0 is a solid, lightweight helmet that’s super comfortable and fits great. It works nicely with all the goggles i've tried regardless of brand. I even managed to fit a stereo system in with some fidgetting. Amazing all around."

— Jackson S. (5/5)

"Helmet is super comfortable it fits perfect its super light weight cant wait to get out and ride with it."

— colton (5/5)

Long Live the GOAT!!!

"Thank you 509 for this tribute helmet to Mr. Block! I grew up watching his rally stunts and gymkhana. He was inspiring to my friends and I to go flat out and live life the fullest. This helmet is great and as much as I want to keep it perty. I know Mr. Block would full send it no matter how shiny haha."

— Tristin W. (5/5)

Issues

"The goggles fog very easy and the opening sits in a bad position on your face, it seems like it should be tilted down further but the goggles press against your nose so the bottom of your vision gets cut off."

— Andrew N. (3/5)

Only the best

"Been rocking 509 gear for years now. Hands down the best helmet and goggle setups."

— Craig P. (5/5)

Q&A

Can a cardio system be used with the helmet?: Hey David, you can purchase a unit from Cardo directly to attach to the side of the helmet, however, the Altitude 2.0 Helmet was not designed to be seamlessly integrated with a Cardo unit and therefore none of the 509 X Cardo units are compatible with it.
Does the altitude 2.0 have a compartment at the back of the helmet for a cardo communication system?: Hey Vera, unfortunately no it does not. Just a heads up though, we will be launching our new winter collection on August 5th and there are several new helmets that will have Cardo UCS compatibility and do have that insert compartment.
Manufactured in China?: Hey Paul, yes our helmets are designed in the US, but our production factories are in China.
Can I turn my size small Altitude 2.0 Carbon into a size medium with new internal padding?: Hey Jason, our Altitude 2.0 Helmets have 3 different shell breakdowns: XS-SM, MD-XL, 2X-4X. With the SM and MD being 2 separate shells, unfortunately you are unable to swap cheek pads to change sizing as the mounting points will not line up. Apologies for the inconvenience!
How/where does the go pro mount? Is it included?: Hey John! Yes you can mount to the top of the helmet, using the center visor screw. We do not include that with the Altitude 2.0 Helmet, but we do offer a [Universal Helmet Camera Mount](https://ride509.com/products/universal-helmet-camera-mount) on our site.

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Visor for Altitude 2.0 Helmet

VEES Protection System for Altitude 2.0 Helmet

Visor Screw Kit for Altitude 2.0 Helmet

Pro Series Breath Box for Altitude 2.0 Helmet

Pro Helmet Bag

Atmosphere Helmet

Tactical 2.0 Helmets

Tactical 3.1 Helmets

Altitude 2.0 Helmet

Quick and Secure Closure:

Time-Saving Convenience:

Enhanced Safety:

Reliable Performance:

AI Generated Review Summary

Summary topics

Review highlights

Reviews

Love it!

Super comfortable, lightweight, can not

Altitude helmet

best helmet ever

Great helmet

Great helmet overall, would reccomend.

Long Live the GOAT!!!

Issues

Only the best

Q&A

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