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A3 Helmet W/MIPS Uno Red

Troy Lee Designs

A3 Helmet W/MIPS

So comfortable you won't ever want to take it off. The 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. 

B-Series MIPS Rotational Brain Protection system creates an optimal 360 degree fit that can maximize the safety features built into the A3. This helmet received the highest possible score (5-STAR) from Virginia Tech's helmet safety lab, so you can feel confident in all conditions.


  • Co-molded EPP and EPS
  • B-Series MIPS Rotational Brain Protection 
  • Advanced layering 3-piece shell
  • 3- Way Magnajust® visor 
  • TLD  Sweat Glide System – EVA wicking foam 
  • 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 
  • Premium 3d Fidlock® magnetic buckle system and composite smart shear screws 
  • Certification - CPSC 1203, CE EN 1078, AS NZ 2063:2008.
    Size Head Circumference
    X-Small/Small 53-56cm