Augmented Reality Navigation: How AR Glasses Are Changing the Cycling Experience

Introduction

Picture this: you’re riding on an unfamiliar mountain road. No need to look down at your bike computer—a semi-transparent blue navigation line floats on the actual road ahead, guiding you to turn right in 200 meters. In the corner of your right lens, power, heart rate, and gradient data are displayed without obstructing your view. An orange warning appears in your upper-left field of vision—AI has detected an upcoming pothole. Through bone-conduction speakers, a voice reports: “8 kilometers to the next rest stop.”

This isn’t the future—this is what AR cycling glasses are delivering in 2025.

The application of Augmented Reality (AR) in cycling is moving from proof-of-concept to practical products. With breakthroughs in optical technology and the maturation of AI visual recognition, AR cycling glasses are poised to become the most impactful cycling tech product since the power meter.

Core Technologies of AR Glasses

Optical Display Systems

The core challenge of AR glasses is how to display virtual information on the lens without obstructing the real-world view. There are currently three main technical approaches:

Waveguide

Principle: A micro-projector casts images into a specially designed waveguide lens. Light travels through the lens via total internal reflection and is ultimately “coupled out” at specific positions into the user’s eyes.

Advantages:

• Lens thickness can be as thin as 2-3mm, close to ordinary glasses
• High light transmittance (>85%), without compromising outdoor visibility
• Can cover a larger field of view

Representative products: Meta Orion (concept device), Vuzix Ultralite

Micro-LED Direct Projection

Principle: Ultra-compact Micro-LED arrays are embedded directly into the lens edge, projecting images through a micro-lens system onto a reflective area.

Advantages:

• Extremely high brightness, readable even in intense sunlight
• Lower power consumption
• Simple structure

Representative products: Engo 2 (mass-produced cycling-specific AR glasses)

Holographic Optical Elements (HOE)

Principle: Holographic recording technology is used to imprint diffractive gratings on the lens, redirecting specific wavelengths of light toward the user’s eyes.

Advantages:

• The lens can be completely transparent (the virtual image is visible only to the user)
• Highly selective for specific wavelengths
• Theoretically capable of full-field coverage

Sensor Array

A fully functional pair of cycling AR glasses needs to integrate multiple sensors:

• IMU (Inertial Measurement Unit): Tracks head orientation and movement to stabilize AR content
• GPS module: Positioning and navigation
• Ambient light sensor: Automatically adjusts display brightness and lens transmittance
• Front-facing camera: Scene recognition, obstacle detection
• Microphone: Voice commands, wind noise cancellation
• Touchpad: Touch-sensitive area on the temple for gesture control

Audio System

Using earbuds while cycling is both dangerous and illegal. AR glasses solve this problem with bone-conduction speakers—sound is transmitted through the skull to the inner ear, without blocking environmental sounds at all.

Technical specifications (typical):

• Frequency response: 100Hz-10kHz
• Volume: ambient noise + 10-15dB
• Nearly inaudible to others (patented directional sound field technology)

In-Depth Review of Current Products

Engo 2

Engo 2 is currently the most mature cycling AR glasses product on the market.

Hardware specifications:

• Display technology: ActiveLook Micro-LED
• Resolution: 304×256 pixels
• Field of view: approximately 15° (monocular, positioned above the right eye)
• Weight: 36 grams
• Battery life: approximately 12 hours
• Connectivity: Bluetooth 5.0, ANT+
• Lenses: interchangeable (clear, gray, yellow)

Software features:

• Real-time display: power, heart rate, speed, cadence, distance, time
• Navigation: turn prompts and distance indicators (not route overlay)
• Integration: data bridging from Garmin, Wahoo, Hammerhead bike computers
• Customization: users can select displayed data fields and layout configurations

Hands-on impressions:

Engo 2’s greatest strengths are its extremely light weight and long battery life. Ride all day with it on and you’ll almost forget it’s there. Display brightness is fully readable in direct sunlight—something many competitors can’t achieve.

But its limitations are equally clear: the display area is only a small block above the right eye, limiting the amount of information. Navigation only provides text prompts (“turn right in 200m”), with no map or route visualization. Essentially, it’s a “heads-up data display” rather than a true AR experience.

Julbo EVAD-1

The EVAD-1, developed by Julbo in partnership with Micro-oled, is another pair of cycling AR glasses built on the same ActiveLook platform as Engo.

Differentiating features:

• Julbo’s sport frame design, suited for Asian face shapes
• Spectron 4 lens technology, ideal for high-altitude intense light conditions
• Deep integration with COROS bike computers

Concept-Level Products: The Next Generation of AR Experience

Next-generation cycling AR systems currently known to be in development are expected to include the following advanced features.

Route Overlay Navigation

Not just simple text prompts, but navigation routes overlaid directly onto the real road. Using GPS positioning and IMU head-tracking, the system renders a semi-transparent virtual path on the lens, as if painted onto the asphalt.

Technical challenges:

• Requires high-precision GPS (RTK-grade, ±2cm)
• Head-tracking latency must be below 20ms, otherwise the virtual route will “drift”
• Requires complete 3D map data

AI Scene Recognition and Hazard Warnings

A front-facing camera paired with an edge AI processor recognizes in real time:

• Road conditions: potholes, puddles, gravel, rail tracks
• Traffic threats: vehicles approaching from behind, doors about to open
• Other road users: pedestrians, other cyclists, animals
• Traffic light status: advance notification of signal states at upcoming intersections

When a hazard is detected, the AR glasses display a prominent warning marker in the corresponding direction and emit an audio alert through the bone-conduction speakers.

Social AR

When riding in a group with friends, AR glasses can:

• Display teammates’ positions and distances (even when out of sight)
• Share real-time data (power, heart rate)
• Mark meeting points and points of interest with AR tags
• Exchange voice messages during the ride

AR-Specific Requirements for Cycling Navigation

Information Design in High-Speed Environments

Cyclists travel at 30-60 km/h, and their attention must remain on the road. Design principles for AR information:

1. Minimize distraction: Information is placed in peripheral vision, without blocking the forward view
2. Rapid readability: All data uses large fonts, high contrast, and clean formatting
3. Context awareness: The system automatically adjusts displayed content based on riding state (showing gradient when climbing, power when sprinting)
4. Progressive prompts: Navigation cues fade in from a distance, giving the rider sufficient reaction time
5. Night mode: Automatically reduces brightness, switches to warm tones, and increases contrast

Climate Adaptability

Taiwan’s climate poses unique challenges for AR glasses:

• High heat and humidity: Anti-fog coatings and ventilation design are essential
• Heavy rain: Hydrophobic lens coatings ensure clear vision in wet conditions
• Intense sunlight: Display brightness must exceed 2000 nits to remain readable in direct sun
• Rapid temperature changes (from air-conditioned rooms to outdoors): The anti-fog system needs to respond quickly

Synergy with Bike Computers

AR glasses should not attempt to replace bike computers—they should complement each other:

Feature	AR Glasses	Bike Computer
Real-time key data	Primary display (visible at a glance)	Backup/detailed data
Navigation	Turn prompts, route overlay	Full maps, route planning
Historical data review	Not suitable	Primary function
In-depth analysis	Not suitable	Post-ride analysis
Hazard alerts	Immediate visual and audio warnings	Not suitable

Safety Considerations

Risk of Distraction

While AR glasses offer convenience, they also carry the risk of distraction. Research shows:

• Reading data on an AR display requires an average of 0.3-0.5 seconds of visual attention
• At 40 km/h, 0.5 seconds means traveling 5.6 meters—enough to miss a hazard
• Excessive AR information can lead to “information overload,” actually reducing situational awareness

Design Countermeasures:

• Strictly limit the number of data fields displayed simultaneously (3-4 at most)
• Use full-field flashing for high-priority alerts to ensure they are noticed
• Automatically simplify the display based on speed (the faster you go, the less information shown)
• Provide a “focus mode”—temporarily disabling all non-critical displays

Current Regulations

• Taiwan: No regulations currently explicitly prohibit AR glasses for cycling, but police may act under “impeding safe driving” provisions
• Europe: Most countries allow AR glasses that do not obstruct vision
• Japan: More conservative; some regions may restrict usage

Buying Recommendations

Products to Watch in 2025

1. Engo 2 (available now, NT$12,000-15,000): The most mature option, suited for serious riders seeking real-time data
2. Julbo EVAD-1 (available now, NT$14,000-18,000): Sports frame design, suited for Asian face shapes
3. Next-generation waveguide products (second half of 2025): The next-gen full AR experience worth waiting for

Buying Considerations

• Brightness: Readability in outdoor sunlight is the top priority
• Weight: Under 40 grams is preferable to avoid discomfort on long rides
• Battery life: At least 8 hours to cover a full day of long-distance riding
• Integration: Confirm compatibility with your bike computer brand
• Lens options: Whether prescription lenses or clip-on options are available

Future Outlook

The development roadmap for cycling AR glasses is roughly as follows:

• 2025-2026: Heads-up data display becomes a standard feature, with basic navigation prompts
• 2027-2028: Route overlay navigation and AI hazard detection begin to proliferate
• 2029-2030: Full-field AR, social features, and voice AI assistants
• 2030+: The possibility of AR contact lenses

Conclusion

AR glasses have the potential to be a game-changer for cycling safety and ride quality. When you no longer need to look down at your bike computer, when hazards are flagged in advance, when navigation blends into the real world—every ride becomes safer, smoother, and more enjoyable.

But technology is just a tool. What matters most is always—get out there, feel the wind, and enjoy the road. What AR glasses can do is make that experience less interrupted and more purely about the joy of riding.

Related Reading

• The Future of Cycling Technology: AI Coaches, Smart Components, and the Riding Revolution of the Next Decade
• Virtual Reality Cycling Training: From Zwift to Full-Sensory Immersive Experiences
• The Future of Cycling: 2030 Trends in E-Bikes, AI Coaches, and Virtual Racing
• Future Cycling Technology: A New Era of Aero Development, Power Meter Evolution, and AI Training Assistants