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Troy Lee Designs A-1 Helmet

$138.95 - $164.95

Item # TLD0273

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  • Drone White, XS/S ($138.95)
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  • Galaxy Red, XS/S ($164.95)
  • Galaxy Red, M/L ($164.95)
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  • Galaxy Blue, XS/S ($164.95)
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  • Galaxy Blue, XL/XXL ($164.95)
  • Drone Gray, XS/S ($138.95)
  • Drone Gray, M/L ($138.95)
  • Drone Gray, XL/XXL ($138.95)
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Item # TLD0273

More coverage, more protection.

Troy Lee Designs doesn’t mess around with gimmicky technologies when it comes to protecting your head — they cover up what can get hurt, carve away spots for air to get through, and add an adjustment system to keep it all tight to your head. The result? The new A-1 Helmet. With a polycarbonate shell over EPS foam, the A-1 will take a beating, even if you hope it never has to. Troy Lee added 16 distinct vents to move air into, over, and out of the helmet, and there’s a synthetic liner with CoolMax pads to assist in moisture management.

  • Multi-position cams for optimal fit
  • Fuller-coverage helmet
  • 16 big vents for airflow

Tech Specs

Shell Material:
Impact Foam:
EPS (foam)
16 vents
Fit Adjustment:
cam-lock stabilizer
Recommended Use:
all mountain, cross country
Manufacturer Warranty:
1 year

Size chart

Troy Lee Designs

Bike Helmets
Head Circumference 21.3 - 22in
(54 - 56cm)
22.4 - 23.2in
(57 - 59cm)
22.6 - 24.8in
(60 - 62cm)
Hat Size 6 3/4 - 7 7 1/8 - 7 3/8 7 1/2 - 7 7/8
Head Circumference 20.5 - 20.9in
(52 - 53cm)
21.3 - 21.7in
(54 - 55cm)
22 - 22.4in
(56 - 57cm)
22.8 - 23.2in
(58 - 59cm)
23.6 - 24.4in
(60 - 62cm)
24.8 - 25.6in
(63 - 65cm)
US Hat Size 6 1/2 - 6 5/8 6 3/4 - 6 7/8 7 - 7 1/8 7 1/4 - 7 3/8 7 1/2 - 7 3/4 7 7/8 - 8 1/8
Head Circumference 21 - 22in
(53 - 55cm)
22.4 - 23.3in
(56 - 59cm)
23.7 - 24.5in
(60 - 62cm)
US Hat Size 6 1/2 - 6 7/8 7 - 7 3/8 7 1/2 - 7 3/4
How to Measure:
With a tape measure, measure the widest point of your head, approximately 1 inch above your eyebrows.

Reviews & Community

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Troy Lee Designs A-1 Helmet

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Here's what others have to say...

Wife and kids got me the A-1 for Father's Day. They ordered the xl/xxl and my head seems to be swimming in it. My head measures an all most perfect 23". Should I return it for a M/L

Responded on

Todd, I would definitely try out the M/L seems like a better fit for you!

Feel free to hit me up at or 801-736-6398.

5 5

Incredible fit!

  • Familiarity: I've used it once or twice and have initial impressions

I can hardly believe how comfortable this helmet is, WOW. The second I placed it on my head I realized why it has such rave reviews. My head measures exactly 59 cm and the M/L is perfect, I'm not even at the max range for size adjustment. Highly recommended.

Unanswered Question

love this helmet. does this A1 matte version come with the protective/storage bag like the other troy lee helmets?

5 5

Fit is awesome!

  • Familiarity: I've used it once or twice and have initial impressions

Get it, your search is over.

Well Ventilated

Good ventilation. My last helmet was a Bell Super and the Troy Lee is not nearly as hot while climbing. The white on the visor and helmet do not completely match up so if you are uptight about true color match you may look elsewhere.

Well Ventilated
5 5

Good Fit, Great Looks

  • Familiarity: I've put it through the wringer

This helmet fits fantastic for my head (roundish profile). It is comfortable and vents well. The strap system is easy to adjust and the chin strap is looped at the end so you don't have two tails dangling in the wind. The anodized visor bolts are a nice finishing touch. As a bonus Oakley Jawbone glasses fit in the vents so you can post up your glasses when climbing. One minor detail is that the white visor does not completely match the white on the helmet.

Good Fit, Great Looks
5 5

Best helmet ever

  • Familiarity: I've put it through the wringer

So, the A1 is really comfortable, nice coverage, pretty much what everyone else said. Unfortunately, I did have the opportunity to use it. Rain washed the trail away from sight, had a bout a 10 foot drop that you really couldn't see. Went OTB at 15 mph and flew head first into a boulder. Visor smacked me in the nose when it broke off, fractured my nose, fractured and dislocated several fingers that went along with the superman I performed. Ended up at the hospital. The ER doc asked what I was wearing, told them about the helmet, gloves etc.. Their comment was that I was extremely lucky to be coming in with what I had based on the trauma I was going thru. They have seen worse injuries with less impact and directly attributed it to the protective gear. The helmet was still intact, albiet it had a few good dents in from the rock garden I landed it, glasses were shot and all scrapped up, but that's what you get those Oakleys for.

No concussion, so I was lucky and the ER Doc attributed it to the helmet.

5 5

Look Good, Feel Good, SEND IT!

  • Gender: Male
  • Familiarity: I've put it through the wringer

TLD took their time and didn't overlook any detail when they designed this helmet and that is very evident once you try it on. The adjustments allow you to perfectly fit the helmet to your head This process is easily accomplished via a dial on the back and the straps. Once they are set they wont accidentally change as i have had happen on other helmets.

With added coverage on the rear and sides this helmet inspires confidence inspiring as if you were wearing a full face. While the helmet is not the lightest helmet on the market it is still perfect for all types of riding. The numerous vents flush the hot air out and keep your head cool on hot days. The vent configuration also allows for easy mounting of gopro's and night lights or even sunglasses during a ride.

The visor has never caused any sight issues and can also be adjusted to your liking. Another nice touch is the anodized aluminum visor bolts.

Look Good, Feel Good, SEND IT!
5 5

Solid Lid

  • Familiarity: I've put it through the wringer

This is a very nice helmet, as you would expect from TLD. I had a POC trabec before this, which I was happy with, but the fit was off just a little bit. This thing feels like it was custom made for my dome. Went with the turbo orange so I would not be mistaken for a deer in the fall/winter months.

5 5


  • Familiarity: I've used it several times

Very good quality, very good fit! A litle bit heavier than the usual cross country helmet, but is the price of extra brain protection! Very good price, cheap for the quality that you buy! Very good confort!

4 5

Great Helmet

  • Familiarity: I've put it through the wringer

I've owned Specialized, Fox and Giro helmets. This is the best fitting most comfortable of them all. Even leave it on to climb.

5 5

Outstanding piece of equipment

  • Familiarity: I've used it several times

I upgraded my lid this year for our vacation to the mountains after taking a few falls recently. This helmet is AWESOME. I felt very secure with it on. I have a slightly odd shape head that usually pushes me to a slightly larger and ultimately less potentially effective size. This locked down onto my noggin no problems and was very cool and comfortable.

My head measures just over 23 inches. I'm...

My head measures just over 23 inches. I'm afraid if it runs small it won't fit. So how true is the sizing? Also how loosely should I be holding the tape measure?

Best Answer Responded on

Hold the tape measure with the same tightness you want out of your helmet. Most people get the best fit from a helmet 1-2 cm bigger than their head size. If your head is 23 inches/58.5 cm, the M/L should be a great fit.

5 5

Amazing Helmet

  • Familiarity: I've used it several times

This is one amazing helmet. I was originally concerned about how well it vented but the helmet exceeded my expectations. Vents almost as well as my old XC lid and definitely deals with any excess sweat much much better. This is the most comfortable helmet I have ever tried and I would highly recommend it. The fit and finish are top notch and as a bonus, it looks great. Also, the visor actually does a great job of keeping the sun out of your face without getting in the way of your vision. BUENO!!

5 5

Best Helmet

  • Familiarity: I've put it through the wringer

I've owned a few, and tried out countless helmets, but nothing comes close to the comfort and fit of this helmet. On top of that it is very nice looking and protective. The ratchet adjust works really well and the helmet overall has a very sturdy construction.

5 5

Excellent fit and finish

  • Familiarity: I've used it several times

This helmet fits great. Tried the Super, and POC, and POC MIPs and none of them felt "right" to me. I also like the subtle color of the grey I picked out. Padding is the best I have seen in a while, and the coverage is outstanding. Previous helmet was a series of Fox Flux helmets that I also like, but the padding was always sub-standard on those.

5 5

This is a keep you safe

  • Familiarity: I've put it through the wringer

TLD doesn't mess around when making something. This is their latest foray into all mountain/trail helmets and they killed it. Extremely comfortable and also adjustable so it will fit just about anyone's head. Tons of coverage to keep you nice and safe too. Best helmet out in my opinion when it comes to comfort, protection, and style

This is a keep you safe
5 5

Most comfortable helmet I have tried on

  • Familiarity: I've used it once or twice and have initial impressions

I tried on the POC Trabec Race, Mips Trabec, Bell Super, and A1. Troy Lee wins by far in fit and coverage. The Bell was a close second on head coverage, but the sides and back of the head didn't cradle it as well. The regular POC Trabec was good, but the rear coverage wasn't as low. The Trabec Mips was a fit failure, see my review after buying it first. I have a size 7 head, 21 7/8. The XS/Small is a perfect fit, with just a bit of extra adjustability on the almost too big side.