Troy Lee Designs A3 Uno MIPS Bicycle Helmet - Comfortable, Safe Fit

Our review of the Troy Lee Designs A3 Uno MIPS finds it aimed at riders who prioritize day-long comfort and strong impact protection. The helmet stands out for pairing a plush comfort liner and a 3-Way Magnajust visor with cutting-edge safety tech including MIPS and an industry-first dual-density core (EPP for high-speed, EPS for low-speed impacts). For commuters, trail riders and anyone who spends hours in the saddle, the A3 Uno MIPS delivers a balanced mix of airflow, easy adjustment and thoughtful extras like a breathable storage bag and FIDLOCK magnetic buckle.

Key Features

• 3-Way Magnajust visor: Allows simple, tool-free visor positioning so riders can fine tune glare control and coverage on the fly.
• Dual-density impact system: Combines EPP for high-speed energy management with EPS for low-speed impacts to broaden protection across crash types.
• MIPS technology: Adds rotational impact protection designed to reduce harmful rotational forces in oblique impacts.
• 16 vents for maximum airflow: The high count of intake and exhaust vents keeps air moving to reduce heat buildup during long rides.
• Comfort liner and fit system: A soft comfort liner plus the 3-way Magnajust and magnetic buckle make the helmet easy to fit and comfortable for extended use.
• Included accessories: Ships with a breathable mesh-paneled storage bag and a FIDLOCK magnetic buckle that simplifies fastening, even with gloves on.

Who It's For

The A3 Uno MIPS is best for adult road and trail riders who want a high-end half-shell helmet that balances ventilation, comfort and modern safety features. Its comfortable liner, versatile visor and excellent airflow make it a good choice for longer training rides, all-day group rides and mixed-terrain outings.

Riders who need a lightweight aero race shell or those on an ultra-tight budget may want to look elsewhere; this helmet targets people willing to pay a bit more for advanced impact materials, MIPS and a refined fit system.

Pros & Cons

Pros

• Excellent comfort from the padded liner and adjustable Magnajust system for a secure, personalized fit.
• Strong safety focus with MIPS and a combined EPP/EPS impact design that covers a range of crash energies.
• Very good airflow thanks to 16 intake and exhaust vents that keep the head cooler on long rides.
• Convenient extras like the FIDLOCK magnetic buckle and breathable storage bag add real everyday value.

Cons

• Premium feature set means a higher price than basic helmets, so cost-conscious buyers may hesitate.
• The helmet is a half-shell design; riders seeking full-face protection for aggressive downhill riding should consider a different category.

Specifications

Our Verdict

The Troy Lee Designs A3 Uno MIPS is a well-rounded, high-comfort bicycle helmet for riders who value ventilation, modern impact protection and everyday convenience. It represents good value for those who want advanced safety features like MIPS and the combined EPP/EPS system, along with a fit system and magnetic buckle that make it comfortable for long use.

Frequently Asked Questions

Does this helmet include MIPS?
Yes, the A3 Uno includes MIPS rotational protection integrated with a dual-density EPP/EPS impact system.

Is the visor adjustable?
Yes, the helmet features a 3-Way Magnajust visor for tool-free position changes to control sun and debris protection.

What accessories come with the helmet?
The helmet ships with a breathable mesh-paneled storage bag and uses a FIDLOCK magnetic buckle for easy fastening.