Overview
The Garmin Tacx FLUX 2 Smart Trainer is a powerful, direct-drive indoor cycling trainer that offers a significant upgrade in accuracy and realism over traditional stationary bikes. By removing your bike's rear wheel and mounting it directly to the trainer, you gain a smooth, responsive ride that replicates the feeling of real-world outdoor cycling. It is designed to handle high-wattage sprints and steep virtual inclines while maintaining a remarkably quiet presence in your home.
Product Page: Garmin Tacx® FLUX 2 Smart Trainer
Key Features and Specifications
Resistance System: Direct drive with 8 permanent ferrite magnets and 8 electromagnets.
Max Power: 2,000 Watts for explosive sprinting.
Max Gradient: Realistically simulates inclines up to a 16% gradient.
Accuracy: Power, speed, and cadence measured to within <2.5% accuracy.
Flywheel: Heavy 16.8 lb (7.6 kg) flywheel for improved ride feel and responsiveness.
Connectivity: BLUETOOTH® Smart technology and ANT+® FE-C protocol; compatible with TrainerRoad, Zwift, and Tacx software.
Axle Compatibility: Includes quick release (130/135 x 5mm) and thru-axle end caps (142/148 x 12mm).
Freehub Body: Compatible with Shimano/SRAM 9 to 11-speed cassettes (Cassette NOT included).
Weight: 52 lbs (23.6 kg).
Footprint: 26.4" L x 25.3" W x 18.1" H (670 x 642 x 460 mm).
Performance Benefits
Realistic Ride Feel: The heavy flywheel and high mass inertia (68.8 lbs / 31.2 kg) provide a fluid, "road-like" pedaling sensation, even when used in standalone (non-connected) mode.
Extreme Stability: A large footprint and well-balanced frame ensure the bike remains stable during 2,000-watt sprints and standing climbs.
Whisper-Quiet Operation: Redesigned internals significantly reduce noise and vibration levels, making it one of the most silent flywheel-equipped trainers available.
Dynamic Training: Connects with the Tacx Training library to access over 100 high-quality virtual rides, from alpine climbs to European city streets.
Multi-Device Connection: Can connect to multiple devices simultaneously (e.g., a tablet for your training app and a Garmin bike computer for data logging).
Maintenance and Care
Calibration: Requires a periodic "spin down" calibration via the Tacx app to ensure power measurements remain accurate within the 2.5% threshold.
Cleanliness: Wipe sweat and moisture off the trainer and your bike frame after every ride to prevent corrosion and salt buildup.
Drive Side Maintenance: Keep the freehub and axle areas free of excess grease and debris. Ensure your cassette is torqued correctly to the freehub body.
Firmware Updates: Use the Tacx Training app to install wireless firmware updates, which optimize connectivity and performance.
Storage: While the FLUX 2 has a large footprint for stability, ensure it is kept in a dry environment to protect the internal electromagnets.
Warranty Information
Manufacturer Warranty: This product is supported by Garmin/Tacx. Please consult the Garmin website or included product documentation for specific coverage details regarding mechanical and electronic components.
Frequently Asked Questions
Q: Does this include a cassette? A: No. You will need to purchase or provide a cassette that matches your bike's drivetrain (Shimano/SRAM 9-11 speed compatible).
Q: Is it compatible with 12-speed drivetrains? A: It is not suitable for Shimano 12-speed Hyperglide+, but SRAM XD and XDR bodies can be purchased separately to accommodate 12-speed setups.
Q: Do I need to plug it into a wall outlet? A: Yes. Unlike the NEO 2T, the FLUX 2 requires an external 110-240V power source to provide variable resistance and connectivity.
Q: Can I use it without an app? A: Yes. In standalone mode, the trainer functions like you are on a flat road; the faster you ride, the higher the resistance becomes.