Eliminate phantom wattage drops, erratic power spikes, and unnecessary weight penalties on critical alpine climbs. Engineered with high-precision dynamometer technology and ridden by WorldTour peloton athletes, the ArcRayo ARS Pro delivers an uncompromising ±1% data accuracy baseline. Whether grinding up HC gradients or dialing in aerodynamic tempo on the flats, this direct-mount spider power meter captures every pedal stroke with race-proven fidelity.
Constructed for aggressive racers who count every single gram, the ARS Pro sits in the featherweight 80-gram class—slashing rotational mass compared to bulky factory spiders without flexing under maximal sprint power. Featuring real-time temperature compensation and multi-mode calibration routines (automatic, head unit, and Bluetooth), your power baseline remains stable through blistering midday heatwaves and sudden high-mountain rainstorms.
Equipped with dual ANT+ and Bluetooth connectivity, the ARS Pro syncs seamlessly with Garmin, Wahoo, and major training platforms like Zwift. Backed by IP68 waterproof protection, an extensive 300-hour rechargeable runtime, and 30 months of factory warranty, it delivers dependable, lab-grade performance to take your scientific training to the next level.
FEATURES
±1% High-Precision Dynamometer
Tracks real-time wattage with minimal variance to guarantee reliable training zones.
Ultralight 80g-Class Chassis
Reduces drivetrain rotational inertia to deliver instantaneous pedaling acceleration.
300-Hour Long-Range Battery
301-Delivers months of uninterrupted training between charges without battery anxiety.
Real-Time Temperature Compensation
Adjusts internal zero-offset dynamically to prevent data drift during sudden weather shifts.
Comprehensive Cycling Dynamics
Broadcasts power, cadence, left/right power balance, and pedal smoothness metrics directly to your head unit.
IP68 Submersible Sealing
Resists heavy rainfall, standing road spray, and grit across brutal all-weather conditions.
Universal Direct-Mount Compatibility
Accommodates SRAM 8-bolt, SRAM 3-bolt, and Easton crank interfaces with 110BCD 4-arm chainrings.
Triple Calibration Protocol
Supports automatic zero-offset, cycling computer calibration, and mobile app fine-tuning.
PRODUCT POSITIONING
Pro-tier lightweight spider power meter engineered for competitive road racers and performance athletes prioritizing weight savings and data consistency.
TARGET AUDIENCE
Competitive road cyclists demanding precise ±1% wattage tracking without drivetrain flex
Climbers and weight-weenies seeking a spider power meter in the featherweight 80g neighborhood
Cyclists utilizing dual ANT+ and Bluetooth protocols for indoor smart trainers and outdoor head units
Riders seeking broad crankset versatility across SRAM and Easton standards
SPECIFICATIONS
Brand: ArcRayo
Model: ARS Pro
Product Type: Spider-Based Power Meter
SKU: ARSPRO-STD
Accuracy: ±1%
Weight: Lightweight class (approx. 80–82g range)
Battery Life: Approx. 300 Hours
Cadence Range: 30–180 RPM
Data Metrics: Power, Cadence, Left/Right Balance, Pedal Smoothness, Low Battery Indicator
Waterproof Rating: IP68
Wireless Protocols: ANT+ / Bluetooth Low Energy (BLE)
Temperature Compensation: Real-Time Dynamic Compensation
Calibration Methods: Automatic, Bike Computer, Bluetooth App
Bolt Circle Diameter (BCD): 110BCD 4-Arm (4S)
Crank Interface Options: SRAM 8-Bolt (Red/Force AXS), SRAM 3-Bolt, Easton (EC90)
