Troy Lee Designs A-1 MIPS Helmet

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Item # TLD00PK

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Item # TLD00PK

Get rad.

With a heritage of hard-hitting gravity and motocross protection, the Troy Lee Designs A-1 MIPS Helmet provides bomber protection in a lightweight package to top off epic enduro runs and technical trail adventures. Featuring the same extended coverage at the back of the head and around the temples as the standard A-1, the A-1 MIPS steps the game up a notch with the inclusion of the Multi-Directional Impact Protection System (MIPS) system.

What makes MIPS so special is its ability to diffuse rotational energy produced by impacts at oblique angles. MIPS consists of a strategically anchored, thin liner on the inside of the helmet that looks exceptionally simple, but serves a big purpose. That little liner is designed to move independently of the helmet shell, so it lets the shell slide across your head in order to redirect impact force.

The A-1 MIPS also boasts a heap of features to keep you cool and comfortable. A total of 16 large vents provide ample 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. Not to ignore fit, the A-1 MIPS helmet incorporates three-position adjustable stabilizer baskets and a cam-lock adjustable stabilizer for a custom, easily dialed fit.

Tech Specs

Shell Material:
polycarbonate
Impact Foam:
aerospace filament reinforced
Ventilation:
16 vents
Fit Adjustment:
rear stabilizer, 3 position adjustable stabilizer baskets
Visor:
yes, adjustable
Full Face:
no
Certifications:
CPSC 1203, CE EN 1078
Recommended Use:
all-mountain, enduro, trail
Manufacturer Warranty:
1 year

Size chart

Troy Lee Designs

Bike Helmets
A-1
 XS/SM/LXL/XXL
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
D3
 XSSMLXLXXL
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
D2
 XS/SM/LXL/XXL
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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Avg. ride time: 12h 35m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Bought it a second time

  • Familiarity: I've put it through the wringer
  • Fit: True to size

Bought one without a lot of research but certainly a respected brand. Ended up having a bad endo a couple days later and cracked it and with the combination of a great helmet and a pinch of luck I ended up ok without much more than a black eye and a bruised ego. So I immediately bought the same model again!

Very comfortable and breathes really well.. Certainly a bit more weight than my Lazer for road but worth it in every way when I'm on trails.

Happy Camper

  • Familiarity: I've put it through the wringer

My priorities when buying a helmet include:
1. Safety
2. Comfortable
3. Breathable

While safety is the most important, I need all three of these boxes to be checked to consider myself a happy camper. This a-1 helmet definitely does just that.

Nice helmet, too big

  • Familiarity: I returned this product before using it

I bought a M/L, though I usually fit into smaller helmets, like the S Smith Forefront. The helmet is pretty bulky on the exterior. The interior fit around my head well, just felt the exterior was too large. Uncertain if MIPs adds to bulk.