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Uno Silver/Electro
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Uno Silver/Electro
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Camo Grey/Red
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Uno Black
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Troy Lee Designs A3 MIPS MTB Helmet
Troy Lee Designs A3 MIPS MTB Helmet
Troy Lee Designs A3 MIPS MTB Helmet

Troy Lee Designs A3 MIPS MTB Helmet

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Backorder: This item is currently out of stock but is available to purchase today as a backorder. The expected availability date shown above is our best estimate as to when it will be shipped to you, but this date is subject to change based on our receipt of this item from its vendor. Shipping in the continental US is free for all backorder items (for international orders, our customer service team will contact you when the item is available to ship). Your credit card will not be charged until your item ships (Paypal requires payment up front, but you can cancel for full refund). Anytime prior to shipment, your backorder can be cancelled by contacting our customer service team.

A3 MTB Helmet with MIPS

So comfortable you won't ever want to take it off. The Troy Lee Designs A3 mountain bike helmet is a new standard in premium mountain bike helmets with luxurious comfort, patent-pending innovations in safety, ventilation that will you keep you cool on the longest climbs with comfort and coverage to protect on the sketchiest of descents.

Highest possible score (5-STAR) from Virginia Tech helmet safety lab so you can feel confident in all conditions.


  • Co-molded EPP and EPS for low and high-speed Patent Pending impact energy management.
  • B-Series MIPS Rotational Brain Protection system creates an optimal 360-degree fit that can maximize the safety features built into the A3.
  • Advanced layering 3-piece shell
  • 3-Way Magnajust® visor easily accommodates goggles whether they are stowed on the upswing or on your face.
  • TLD Sweat Glide System -EVA wicking foam behind the comfort liner along the front brow directs sweat away from the eyes and optics. Includes 2 spares.
  • 2-piece Ionic® comfort liner for anti-microbial & sweat-wicking properties that is also quick to dry
  • 16 vents optimally tuned with the channeling of the helmet to create the most intake and exhaust of any half shell helmet we've produced
  • Premium 3d Fidlock® magnetic buckle system and composite smart shear screws are made to shear away during severe impact/direct hit to the visor.
  • Includes helmet carrying bag, (2) spare sweat glide strips, and a spare Ionic® comfort liner and sticker kit
  • Certification - CPSC 1203, CE EN 1078, AS NZ 2063:2008.

  • Free Exchanges: This product qualifies for free exchanges within the first 60 days after order. We'll cover the shipping both ways for US customers if you need a different size and/or color of this product. Returned product must be in new condition with all labels and packaging. Free exchanges apply only for product in stock or available for backorder.

    B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

    Uno Black - XS/S

    Mfg PartNum: 150267001 

    Uno Black - M/L

    Mfg PartNum: 150267003 

    Uno Black - XL/2XL

    Mfg PartNum: 150267005 

    Uno Silver/Electro - XS/S

    Mfg PartNum: 150267011 

    Uno Silver/Electro - M/L

    Mfg PartNum: 150267013 

    Uno Silver/Electro - XL/2XL

    Mfg PartNum: 150267015 

    Proto White - XS/S

    Mfg PartNum: 150256001 

    Proto White - M/L

    Mfg PartNum: 150256003 

    Proto White - XL/2XL

    Mfg PartNum: 150256005 

    Camo Grey/Red - XS/S

    Mfg PartNum: 150967021 

    Camo Grey/Red - M/L

    Mfg PartNum: 150967023 

    Camo Grey/Red - XL/2XL

    Mfg PartNum: 150967025 

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    *Orders received before 3:00PM Pacific time are shipped the same day (Mon-Sat). Orders over $50
    are shipped free (USA only, excluding AK and HI). Some exceptions apply. See Shipping for details. 02


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