Looks great and feels great
"Love the design, and the fit, I could wear this all day without any bother, very comfortable and protected with MIPS tech. Love it!"
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A3 leaves nothing to chance by setting the modern standard in protection and fit as demanded by Troy Lee Designs athletes. Equipped with Mips® protection, the co-molded EPP/EPS design features sixteen vents to optimize airflow making for a helmet that is so comfortable it practically disappears on your head.
The ultimate protection for your head.
Coming in at 315g, you won't notice it the weight, while keeping your head safe.
16 vents optimally tuned with the channeling of the helmet



A3 leaves nothing to chance by setting the modern standard in protection and fit as demanded by Troy Lee Designs athletes. Equipped with Mips® protection, the co-molded EPP/EPS design features sixteen vents to optimize airflow making for a helmet that is so comfortable it practically disappears on your head.
The ultimate protection for your head.
Coming in at 315g, you won't notice it the weight, while keeping your head safe.
16 vents optimally tuned with the channeling of the helmet
3-Way Magnajust® visor
Advanced layering 3-piece shell
Exceeds bicycle certifications: CPSC 1203, CE EN 1078, AS NZ 2063:2008* (* varies by regional standards)
B-Series Mips® Rotational Brain Protection co-molded into retention system
Weight: 415g
16 vents optimally tuned with the channeling of the helmet
Micro-adjust 360-degree retention system
Premium 3D Fidlock® magnetic buckle system
Customizable 2-piece Ionic® comfort liner for anti-microbial & sweat wicking properties that is also quick to dry
EVA wicking foam
| XS/SM | MD/LG | XL/XXL | |
|---|---|---|---|
| Hat Size | 6 5/8 - 7 | 7 7/8 - 7 3/8 | 7 1/2 - 7 7/8 |
| CM | 53 - 56 | 57 - 59 | 60 - 63 |
| IN | 20 7/8 - 22 | 22 3/8 - 23 1/4 | 23 5/8 - 24 3/4 |
Measuring your head with a fabric tape measure around the circumference of your head holding the tape just above your eyebrows and ears. 1” = 25mm