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Troy Lee DesignsA3 MIPS Helmet


Item # TLDY0H8

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Item # TLDY0H8

Why We Like The A3 MIPS Helmet

Even if you know the twists and turns of the trail like the back of your hand, your noggin still deserves reliable protection against unexpected falls and impacts. To cover your cranium for those all-mountain adventures, throw on the Troy Lee Designs A3 MIPS Helmet. Its polycarbonate shell is designed to act as the initial barrier when charging trails, and underlying EPS foam absorbs impact through every fall. The A3 offers additional coverage along the temples and base of your head than its smaller sibling, the A2, but doesn't go overboard with chin bars that are better-suited for the bike park. MIPS technology repositions the helmet to soak up angled impacts, and a ventilated shell keeps you cool on hot summer rides. To protect your eyes from debris and glare, the A3 employs a three-position adjustable visor that our riders applaud for its ability to break cleanly from the helmet through a fall, reducing impact forces if you don't happen to stick the landing.
  • A ventilated all-mountain helmet for confident control in the saddle
  • Rugged in-mold construction absorbs blows and impacts
  • Ventilated shell boosts airflow as your ride heats up
  • Positioned foam wicks sweat to enhance comfort and fight odor
  • Additional coverage along the temples and base increases protection
  • Retention fit system dials in the perfect, customized fit
  • Adjustable visor shields against dirt, debris, and glare

Tech Specs
Shell Materialpolycarbonate
Impact FoamEPS
Ventilation16 vents
Fit Adjustmentrear-stabilizer fit system
Recommended Useenduro, trail
Manufacturer Warranty1 year

Troy Lee Designs

A1, A2
Head Circumference

19 - 20.9in

(48 - 53cm)

19.8 - 21.4in

(50 - 54cm)

21.3 - 22in

(54 - 56cm)

22.4 - 23.2in

(57 - 59cm)

22.6 - 24.8in

(60 - 62cm)

Hat Size 6 - 6 5/8 6 1/4 - 6 3/4 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)

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
 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
How to Measure:
With a tape measure, measure the widest point of your head, approximately 1 inch above your eyebrows.

What do you think about this product?


>Rating: 5

Love at First Ride

I've used it once or twice and have initial impressions
True to size
Size Bought

Initial impressions of course, but after one ride in the A3 MIPS helmet, I'm a big fan. I once tried on a TLD A1 and instantly was uncomfortable, so I had my hesitations trying out the A3 MIPS helmet. Pulled it out of the box, threw it on, and was blown away at how comfortable it is and how well it fits my head. The adjustable boa system and ability to move the rear stabilizer fit system (the plastic that cradles the back of your head) up and down allows you to find that perfect fit. I personally wish it were halfway between the lowest two notches, but the middle does just fine. The ventilation is next level as well. The lightweight helmet breathes incredibly well on the way up, and for someone that overheats easily, that is clutch. The adjustable visor uses magnets, so it's easy to adjust, but stays in place even on rowdy sections of trail. Troy Lee Designs absolutely crushed it with the A3 MIPS helmet. A stylish, yet incredibly functional design leaves you looking great while being protected. Oh and the magnetic buckle is easy to do and undo with one hand, yet stays locked on the ride with zero concern. Sizing is on par with Smith and POC helmets as well. Easy to slide your sunglasses into the front of the helmet for storage as well.