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Troy Lee Designs A1 MIPS Helmet

Sale $97.30 - $139.00

Item # TLD00VZ

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  • Classic White, XS/S ($139.00)
  • Classic White, M/L ($139.00)
  • Classic White, XL/XXL ($139.00)
  • Classic Trooper, XS/S ($139.00)
  • Classic Trooper, XL/XXL ($139.00)
  • Classic Red, XS/S ($139.00)
  • Classic Red, M/L ($139.00)
  • Classic Red, XL/XXL ($139.00)
  • Classic Orange, XS/S ($139.00)
  • Classic Orange, M/L ($139.00)
  • Classic Orange, XL/XXL ($139.00)
  • Classic Ocean, XS/S ($139.00)
  • Classic Ocean, M/L ($139.00)
  • Classic Ocean, XL/XXL ($139.00)
  • Classic Gray, XS/S ($139.00)
  • Classic Gray, M/L ($139.00)
  • Classic Gray, XL/XXL ($139.00)
  • Classic Flo Yellow, XS/S ($139.00)
  • Classic Flo Yellow, M/L ($139.00)
  • Classic Flo Yellow, XL/XXL ($139.00)
  • Classic Blue/White, XS/S ($139.00)
  • Classic Blue/White, M/L ($139.00)
  • Classic Blue/White, XL/XXL ($139.00)
  • Classic Black/Blue, XS/S ($139.00)
  • Classic Black/Blue, M/L ($139.00)
  • Classic Black/Blue, XL/XXL ($139.00)
  • Classic Black, XS/S ($139.00)
  • Classic Black, M/L ($139.00)
  • Classic Black, XL/XXL ($139.00)
  • Classic Yellow/Black, XL/XXL ($97.30)
  • Classic Orange/Gray, XS/S ($97.30)
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Item # TLD00VZ


Time to get rad.

Building on Troy Lee Designs' heritage of hard-hitting gravity and motocross protection, the A1 MIPS Helmet provides bomber protection in a lightweight package to top off epic enduro runs and technical trail adventures. Featuring the same extended protection at the back of the head and around the temples as the standard A1, the A1 MIPS steps the safety up a notch with the inclusion of the Multi-Directional Impact Protection (MIPS) system for an extra boost of Impact force dissipation any time you (literally) hit the trail.

In addition to its penchant for safety, the A1 MIPS boasts a heap of features to keep you cool and comfortable. A total of 16 large vents usher cooling airflow and encourage constant air movement across your dome. A removable, soft and plushy Coolmax liner sits comfortably against your head, fending off the stink produced by bacteria, and not to ignore fit, the A1 MIPS helmet incorporates a three-position adjustable retention system for a custom, easily dialed fit.

  • A lightweight helmet built for technical trails
  • MIPS technology aims to reduce rotational force in certain crashes
  • Durable in-mold shell construction
  • Large vents promote cooling airflow
  • Highly adjustable retention system dials in the fit
  • Adjustable visor fends off branches and glaring sun

Tech Specs

Shell Material:
in-molded polycarbonate
Impact Foam:
16 vents
Fit Adjustment:
triple position adjustable retention system
Recommended Use:
mountain bike
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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Best helmet out there

  • Familiarity: I've put it through the wringer

Extremely comfortable, lightweight, breathable, and it comes with MIPS. No complaints!

Fantastic Helmet

  • Familiarity: I've put it through the wringer

Have a couple of these. One for myself and one for guest riders, and they're great. Along with myself, everyone who has used one digs it. Get it with MIPS and protect yourself.


  • Familiarity: I gave it as a gift but have feedback to share

Love Troy Lee products (check out the Skyline Shorts--awesome!): use the size guide to get the right fit. Light, comfortable, great ventilation. You can ride with confidence so be sure to spend a little more time to get the fit dialed in. Willing to spend a small amount more for the MIPS technology . Since taking time to adjust this to a proper fit, there's no slippage which could result in the helmet sliding back which can expose your forehead-never a good thing when you crash. Highly recommend.

Fits perfect.

  • Familiarity: I've used it several times
  • Fit: True to size

Your noodle is covered if you go over the bars. Fits snug and comfortable.


  • Familiarity: I've used it several times

Loving this helmet. Light weight, adjustable, comfortable, breathable....good looking and protects my brainy bits.

Has been using an old Bell helmet and decided to upgrade. 5ft4, normal head and i got the xs/s. I felt like i was on the cusp and should get Med, but glad i got small. sometimes i crank it too tight in fear of it not being tight enough....a few crashed early on can do that to a gal. after a few headaches i loosened it up, its secure and feels good. Go for the best to save your brains.

I am fairly new to mountain biking and have flown over my bars only a couple times but besides no skin on my knees i have felt confident in my helmet.


Awesome Helmet!

  • Familiarity: I've put it through the wringer

Troy Lee makes some quality gear and the A1 is no exception. I have owned this helmet for a couple years now and have no complaints. Its protective, comfy, and looks sick. Not much else you could want from a helmet.

great lid

  • Familiarity: I've put it through the wringer

Had the original A1 for a few years and love the fit and style. Now they add MIPS and the added safety is just another reason to own this helmet.

Great enduro lid

    Bought this helmet to replace my smith helmet. Fits my head much better, and feels like it offers more protection. Only small qualm is my sunglasses don't fit as easily as with my smith helmet -- its a bit of a tight fit.

    Fits my big head well!

    • Familiarity: I've used it several times

    I always have a hard time finding a helmet that fits me well and this helmet actually fit perfectly! The matte black gives it a pretty slick look to it and the MIPS is always a plus for safety! I would highly recommend this for the avid mountain biker wether you are a weekend warrior or the everyday rider!

    Love it!

    • Familiarity: I've used it several times

    This helmet is great! I absolutely love it! It is light weight, has an adjustable fit and is comfortable to wear while biking. This is my first mountain biking helmet and I would definitely recommend it to others.

    Great Helmet

    • Familiarity: I've used it several times

    This helmet is awesome. It is super breathable, lightweight, offers tons of protection, and the adjustable fit is top notch. On top of all that the MIPS this helmet has to offer just makes it even better. Love the look of it and everything else about it. Overall would highly recommend to anyone looking for a great helmet with a ton of protection!

    Solid protection

    • Familiarity: I've used it several times

    This is my first real mountain bike helmet and I love it. Great design, airflow, and fit.


    • Familiarity: I've put it through the wringer

    Most comfortable helmet on the market in my opinion. Also looks nice and is super lightweight. 10/10.

    The "gray and orange" clearly looks red and black to me. Is it jus me?

    I am with you, It looks to be a darker burnt orange/red and the "grey" looks a little darker too.

    Love this helmet

    • Familiarity: I've used it several times

    Super lightweight and really comfortable. This is probably the best fitting helmet I've ever put on my head. The adjustable dial in the back makes it fit perfectly.

    Sweet Helmet

    • Familiarity: I've put it through the wringer

    This is by far one of the better looking helmets out there. Gives great protection and also vents fairly well. Lots of colors to choose from and the MIPS version is a nice addition.

    Hipster brother loves it

      this helmet is lightweight, vented well, and comfy. Genius MIPS design. Adjustable visor is nice for climb vs descent. The dial at the back of the helmet is easily turned for a secure and comfy fit, I can rock my man bun easily without hindering the fit of this helmet. Highly recommended

      Great Upgrade

      • Familiarity: I've used it several times

      I finally made the upgrade from a road helmet for mountain biking to something with a little more size and protection to it. This helmet has been great so far. Not sure how it will do in heat as it is a little larger, but the protection is certainly worth it.